| Commit message (Collapse) | Author | Age | Files | Lines |
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consumer
sysfs_remove_link() causes a warning if the parent directory does not
exist. That can happen if the device link consumer has not been registered.
So do not attempt sysfs_remove_link() in that case.
Fixes: 287905e68dd29 ("driver core: Expose device link details in sysfs")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # 5.9+
Reviewed-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20210716114408.17320-2-adrian.hunter@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If driver_register() returns with error we need to free the memory
allocated for auxdrv->driver.name before returning from
__auxiliary_driver_register()
Fixes: 7de3697e9cbd4 ("Add auxiliary bus support")
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20210713093438.3173-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These include cpufreq core simplifications and fixes, cpufreq driver
updates, cpuidle driver update, a generic power domains (genpd)
locking fix and a debug-related simplification of the PM core.
Specifics:
- Drop the ->stop_cpu() (not really useful) and ->resolve_freq()
(unused) cpufreq driver callbacks and modify the users of the
former accordingly (Viresh Kumar, Rafael Wysocki).
- Add frequency invariance support to the ACPI CPPC cpufreq driver
again along with the related fixes and cleanups (Viresh Kumar).
- Update the Meditak, qcom and SCMI ARM cpufreq drivers (Fabien
Parent, Seiya Wang, Sibi Sankar, Christophe JAILLET).
- Rename black/white-lists in the DT cpufreq driver (Viresh Kumar).
- Add generic performance domains support to the dvfs DT bindings
(Sudeep Holla).
- Refine locking in the generic power domains (genpd) support code to
avoid lock dependency issues (Stephen Boyd).
- Update the MSM and qcom ARM cpuidle drivers (Bartosz Dudziak).
- Simplify the PM core debug code by using ktime_us_delta() to
compute time interval lengths (Mark-PK Tsai)"
* tag 'pm-5.14-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (21 commits)
PM: domains: Shrink locking area of the gpd_list_lock
PM: sleep: Use ktime_us_delta() in initcall_debug_report()
cpufreq: CPPC: Add support for frequency invariance
arch_topology: Avoid use-after-free for scale_freq_data
cpufreq: CPPC: Pass structure instance by reference
cpufreq: CPPC: Fix potential memleak in cppc_cpufreq_cpu_init
cpufreq: Remove ->resolve_freq()
cpufreq: Reuse cpufreq_driver_resolve_freq() in __cpufreq_driver_target()
cpufreq: Remove the ->stop_cpu() driver callback
cpufreq: powernv: Migrate to ->exit() callback instead of ->stop_cpu()
cpufreq: CPPC: Migrate to ->exit() callback instead of ->stop_cpu()
cpufreq: intel_pstate: Combine ->stop_cpu() and ->offline()
cpuidle: qcom: Add SPM register data for MSM8226
dt-bindings: arm: msm: Add SAW2 for MSM8226
dt-bindings: cpufreq: update cpu type and clock name for MT8173 SoC
clk: mediatek: remove deprecated CLK_INFRA_CA57SEL for MT8173 SoC
cpufreq: dt: Rename black/white-lists
cpufreq: scmi: Fix an error message
cpufreq: mediatek: add support for mt8365
dt-bindings: dvfs: Add support for generic performance domains
...
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* pm-cpuidle:
cpuidle: qcom: Add SPM register data for MSM8226
dt-bindings: arm: msm: Add SAW2 for MSM8226
* pm-sleep:
PM: sleep: Use ktime_us_delta() in initcall_debug_report()
* pm-domains:
PM: domains: Shrink locking area of the gpd_list_lock
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On trogdor devices I see the following lockdep splat when stopping
youtube with lockdep enabled in the kernel.
======================================================
WARNING: possible circular locking dependency detected
5.13.0-rc2 #71 Not tainted
------------------------------------------------------
ThreadPoolSingl/3969 is trying to acquire lock:
ffffff80d4d5c080 (&inst->lock#3){+.+.}-{3:3}, at: vdec_buf_cleanup+0x3c/0x17c [venus_dec]
but task is already holding lock:
ffffff80d3c3c4f8 (&q->mmap_lock){+.+.}-{3:3}, at: vb2_core_reqbufs+0xe4/0x390 [videobuf2_common]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #5 (&q->mmap_lock){+.+.}-{3:3}:
__mutex_lock_common+0xcc/0xb88
mutex_lock_nested+0x5c/0x68
vb2_mmap+0xf4/0x290 [videobuf2_common]
v4l2_m2m_fop_mmap+0x44/0x50 [v4l2_mem2mem]
v4l2_mmap+0x5c/0xa4
mmap_region+0x310/0x5a4
do_mmap+0x348/0x43c
vm_mmap_pgoff+0xfc/0x178
ksys_mmap_pgoff+0x84/0xfc
__arm64_compat_sys_aarch32_mmap2+0x2c/0x38
invoke_syscall+0x54/0x110
el0_svc_common+0x88/0xf0
do_el0_svc_compat+0x28/0x34
el0_svc_compat+0x24/0x34
el0_sync_compat_handler+0xc0/0xf0
el0_sync_compat+0x19c/0x1c0
-> #4 (&mm->mmap_lock){++++}-{3:3}:
__might_fault+0x60/0x88
filldir64+0x124/0x3a0
dcache_readdir+0x7c/0x1ec
iterate_dir+0xc4/0x184
__arm64_sys_getdents64+0x78/0x170
invoke_syscall+0x54/0x110
el0_svc_common+0xa8/0xf0
do_el0_svc_compat+0x28/0x34
el0_svc_compat+0x24/0x34
el0_sync_compat_handler+0xc0/0xf0
el0_sync_compat+0x19c/0x1c0
-> #3 (&sb->s_type->i_mutex_key#3){++++}-{3:3}:
down_write+0x94/0x1f4
start_creating+0xb0/0x174
debugfs_create_dir+0x28/0x138
opp_debug_register+0x88/0xc0
_add_opp_dev+0x84/0x9c
_add_opp_table_indexed+0x16c/0x310
_of_add_table_indexed+0x70/0xb5c
dev_pm_opp_of_add_table_indexed+0x20/0x2c
of_genpd_add_provider_onecell+0xc4/0x1c8
rpmhpd_probe+0x21c/0x278
platform_probe+0xb4/0xd4
really_probe+0x140/0x35c
driver_probe_device+0x90/0xcc
__device_attach_driver+0xa4/0xc0
bus_for_each_drv+0x8c/0xd8
__device_attach+0xc4/0x150
device_initial_probe+0x20/0x2c
bus_probe_device+0x40/0xa4
device_add+0x22c/0x3fc
of_device_add+0x44/0x54
of_platform_device_create_pdata+0xb0/0xf4
of_platform_bus_create+0x1d0/0x350
of_platform_populate+0x80/0xd4
devm_of_platform_populate+0x64/0xb0
rpmh_rsc_probe+0x378/0x3dc
platform_probe+0xb4/0xd4
really_probe+0x140/0x35c
driver_probe_device+0x90/0xcc
__device_attach_driver+0xa4/0xc0
bus_for_each_drv+0x8c/0xd8
__device_attach+0xc4/0x150
device_initial_probe+0x20/0x2c
bus_probe_device+0x40/0xa4
device_add+0x22c/0x3fc
of_device_add+0x44/0x54
of_platform_device_create_pdata+0xb0/0xf4
of_platform_bus_create+0x1d0/0x350
of_platform_bus_create+0x21c/0x350
of_platform_populate+0x80/0xd4
of_platform_default_populate_init+0xb8/0xd4
do_one_initcall+0x1b4/0x400
do_initcall_level+0xa8/0xc8
do_initcalls+0x5c/0x9c
do_basic_setup+0x2c/0x38
kernel_init_freeable+0x1a4/0x1ec
kernel_init+0x20/0x118
ret_from_fork+0x10/0x30
-> #2 (gpd_list_lock){+.+.}-{3:3}:
__mutex_lock_common+0xcc/0xb88
mutex_lock_nested+0x5c/0x68
__genpd_dev_pm_attach+0x70/0x18c
genpd_dev_pm_attach_by_id+0xe4/0x158
genpd_dev_pm_attach_by_name+0x48/0x60
dev_pm_domain_attach_by_name+0x2c/0x38
dev_pm_opp_attach_genpd+0xac/0x160
vcodec_domains_get+0x94/0x14c [venus_core]
core_get_v4+0x150/0x188 [venus_core]
venus_probe+0x138/0x444 [venus_core]
platform_probe+0xb4/0xd4
really_probe+0x140/0x35c
driver_probe_device+0x90/0xcc
device_driver_attach+0x58/0x7c
__driver_attach+0xc8/0xe0
bus_for_each_dev+0x88/0xd4
driver_attach+0x30/0x3c
bus_add_driver+0x10c/0x1e0
driver_register+0x70/0x108
__platform_driver_register+0x30/0x3c
0xffffffde113e1044
do_one_initcall+0x1b4/0x400
do_init_module+0x64/0x1fc
load_module+0x17f4/0x1958
__arm64_sys_finit_module+0xb4/0xf0
invoke_syscall+0x54/0x110
el0_svc_common+0x88/0xf0
do_el0_svc_compat+0x28/0x34
el0_svc_compat+0x24/0x34
el0_sync_compat_handler+0xc0/0xf0
el0_sync_compat+0x19c/0x1c0
-> #1 (&opp_table->genpd_virt_dev_lock){+.+.}-{3:3}:
__mutex_lock_common+0xcc/0xb88
mutex_lock_nested+0x5c/0x68
_set_required_opps+0x74/0x120
_set_opp+0x94/0x37c
dev_pm_opp_set_rate+0xa0/0x194
core_clks_set_rate+0x28/0x58 [venus_core]
load_scale_v4+0x228/0x2b4 [venus_core]
session_process_buf+0x160/0x198 [venus_core]
venus_helper_vb2_buf_queue+0xcc/0x130 [venus_core]
vdec_vb2_buf_queue+0xc4/0x140 [venus_dec]
__enqueue_in_driver+0x164/0x188 [videobuf2_common]
vb2_core_qbuf+0x13c/0x47c [videobuf2_common]
vb2_qbuf+0x88/0xec [videobuf2_v4l2]
v4l2_m2m_qbuf+0x84/0x15c [v4l2_mem2mem]
v4l2_m2m_ioctl_qbuf+0x24/0x30 [v4l2_mem2mem]
v4l_qbuf+0x54/0x68
__video_do_ioctl+0x2bc/0x3bc
video_usercopy+0x558/0xb04
video_ioctl2+0x24/0x30
v4l2_ioctl+0x58/0x68
v4l2_compat_ioctl32+0x84/0xa0
__arm64_compat_sys_ioctl+0x12c/0x140
invoke_syscall+0x54/0x110
el0_svc_common+0x88/0xf0
do_el0_svc_compat+0x28/0x34
el0_svc_compat+0x24/0x34
el0_sync_compat_handler+0xc0/0xf0
el0_sync_compat+0x19c/0x1c0
-> #0 (&inst->lock#3){+.+.}-{3:3}:
__lock_acquire+0x248c/0x2d6c
lock_acquire+0x240/0x314
__mutex_lock_common+0xcc/0xb88
mutex_lock_nested+0x5c/0x68
vdec_buf_cleanup+0x3c/0x17c [venus_dec]
__vb2_queue_free+0x98/0x204 [videobuf2_common]
vb2_core_reqbufs+0x14c/0x390 [videobuf2_common]
vb2_reqbufs+0x58/0x74 [videobuf2_v4l2]
v4l2_m2m_reqbufs+0x58/0x90 [v4l2_mem2mem]
v4l2_m2m_ioctl_reqbufs+0x24/0x30 [v4l2_mem2mem]
v4l_reqbufs+0x58/0x6c
__video_do_ioctl+0x2bc/0x3bc
video_usercopy+0x558/0xb04
video_ioctl2+0x24/0x30
v4l2_ioctl+0x58/0x68
v4l2_compat_ioctl32+0x84/0xa0
__arm64_compat_sys_ioctl+0x12c/0x140
invoke_syscall+0x54/0x110
el0_svc_common+0x88/0xf0
do_el0_svc_compat+0x28/0x34
el0_svc_compat+0x24/0x34
el0_sync_compat_handler+0xc0/0xf0
el0_sync_compat+0x19c/0x1c0
other info that might help us debug this:
Chain exists of:
&inst->lock#3 --> &mm->mmap_lock --> &q->mmap_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&q->mmap_lock);
lock(&mm->mmap_lock);
lock(&q->mmap_lock);
lock(&inst->lock#3);
*** DEADLOCK ***
1 lock held by ThreadPoolSingl/3969:
#0: ffffff80d3c3c4f8 (&q->mmap_lock){+.+.}-{3:3}, at: vb2_core_reqbufs+0xe4/0x390 [videobuf2_common]
stack backtrace:
CPU: 2 PID: 3969 Comm: ThreadPoolSingl Not tainted 5.13.0-rc2 #71
Hardware name: Google Lazor (rev3+) with KB Backlight (DT)
Call trace:
dump_backtrace+0x0/0x1b4
show_stack+0x24/0x30
dump_stack+0xe0/0x15c
print_circular_bug+0x32c/0x388
check_noncircular+0x138/0x140
__lock_acquire+0x248c/0x2d6c
lock_acquire+0x240/0x314
__mutex_lock_common+0xcc/0xb88
mutex_lock_nested+0x5c/0x68
vdec_buf_cleanup+0x3c/0x17c [venus_dec]
__vb2_queue_free+0x98/0x204 [videobuf2_common]
vb2_core_reqbufs+0x14c/0x390 [videobuf2_common]
vb2_reqbufs+0x58/0x74 [videobuf2_v4l2]
v4l2_m2m_reqbufs+0x58/0x90 [v4l2_mem2mem]
v4l2_m2m_ioctl_reqbufs+0x24/0x30 [v4l2_mem2mem]
v4l_reqbufs+0x58/0x6c
__video_do_ioctl+0x2bc/0x3bc
video_usercopy+0x558/0xb04
video_ioctl2+0x24/0x30
v4l2_ioctl+0x58/0x68
v4l2_compat_ioctl32+0x84/0xa0
__arm64_compat_sys_ioctl+0x12c/0x140
invoke_syscall+0x54/0x110
el0_svc_common+0x88/0xf0
do_el0_svc_compat+0x28/0x34
el0_svc_compat+0x24/0x34
el0_sync_compat_handler+0xc0/0xf0
el0_sync_compat+0x19c/0x1c0
The 'gpd_list_lock' is nominally named as such to protect the 'gpd_list'
from concurrent access and mutation. Unfortunately, holding that mutex
around various OPP framework calls leads to lockdep splats because now
we're doing various operations in OPP core such as registering with
debugfs while holding the list lock. We don't need to hold any list
mutex while we're calling into OPP, so let's shrink the locking area of
the 'gpd_list_lock' so that lockdep isn't triggered. This also helps
reduce contention on this lock, which probably doesn't matter much but
at least is nice to have.
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <linux-pm@vger.kernel.org>
Cc: Viresh Kumar <vireshk@kernel.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Use ktime_us_delta() to make the debug log more precise instead of
shifting the return value of ktime_to_ns() applied to a ktime_sub()
result by 10 bit positions to the right.
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
[ rjw: Changelog rewrite, subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Currently topology_scale_freq_tick() (which gets called from
scheduler_tick()) may end up using a pointer to "struct
scale_freq_data", which was previously cleared by
topology_clear_scale_freq_source(), as there is no protection in place
here. The users of topology_clear_scale_freq_source() though needs a
guarantee that the previously cleared scale_freq_data isn't used
anymore, so they can free the related resources.
Since topology_scale_freq_tick() is called from scheduler tick, we don't
want to add locking in there. Use the RCU update mechanism instead
(which is already used by the scheduler's utilization update path) to
guarantee race free updates here.
synchronize_rcu() makes sure that all RCU critical sections that started
before it is called, will finish before it returns. And so the callers
of topology_clear_scale_freq_source() don't need to worry about their
callback getting called anymore.
Cc: Paul E. McKenney <paulmck@kernel.org>
Fixes: 01e055c120a4 ("arch_topology: Allow multiple entities to provide sched_freq_tick() callback")
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Tested-by: Qian Cai <quic_qiancai@quicinc.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / Thunderbolt updates from Greg KH:
"Here is the big set of USB and Thunderbolt patches for 5.14-rc1.
Nothing major here just lots of little changes for new hardware and
features. Highlights are:
- more USB 4 support added to the thunderbolt core
- build warning fixes all over the place
- usb-serial driver updates and new device support
- mtu3 driver updates
- gadget driver updates
- dwc3 driver updates
- dwc2 driver updates
- isp1760 host driver updates
- musb driver updates
- lots of other tiny things.
Full details are in the shortlog.
All of these have been in linux-next for a while now with no reported
issues"
* tag 'usb-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (223 commits)
phy: qcom-qusb2: Add configuration for SM4250 and SM6115
dt-bindings: phy: qcom,qusb2: document sm4250/6115 compatible
dt-bindings: usb: qcom,dwc3: Add bindings for sm6115/4250
USB: cdc-acm: blacklist Heimann USB Appset device
usb: xhci-mtk: allow multiple Start-Split in a microframe
usb: ftdi-elan: remove redundant continue statement in a while-loop
usb: class: cdc-wdm: return the correct errno code
xhci: remove redundant continue statement
usb: dwc3: Fix debugfs creation flow
usb: gadget: hid: fix error return code in hid_bind()
usb: gadget: eem: fix echo command packet response issue
usb: gadget: f_hid: fix endianness issue with descriptors
Revert "USB: misc: Add onboard_usb_hub driver"
Revert "of/platform: Add stubs for of_platform_device_create/destroy()"
Revert "usb: host: xhci-plat: Create platform device for onboard hubs in probe()"
Revert "arm64: dts: qcom: sc7180-trogdor: Add nodes for onboard USB hub"
xhci: solve a double free problem while doing s4
xhci: handle failed buffer copy to URB sg list and fix a W=1 copiler warning
xhci: Add adaptive interrupt rate for isoch TRBs with XHCI_AVOID_BEI quirk
xhci: Remove unused defines for ERST_SIZE and ERST_ENTRIES
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We want the usb fixes in here as well, and this resolves some merge
issues with:
drivers/usb/dwc3/debugfs.c
drivers/usb/dwc3/gadget.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We need the usb/thunderbolt fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Move the "removable" attribute from USB to core in order to allow it to be
supported by other subsystem / buses. Individual buses that want to support
this attribute can populate the removable property of the device while
enumerating it with the 3 possible values -
- "unknown"
- "fixed"
- "removable"
Leaving the field unchanged (i.e. "not supported") would mean that the
attribute would not show up in sysfs for that device. The UAPI (location,
symantics etc) for the attribute remains unchanged.
Move the "removable" attribute from USB to the device core so it can be
used by other subsystems / buses.
By default, devices do not have a "removable" attribute in sysfs.
If a subsystem or bus driver wants to support a "removable" attribute, it
should call device_set_removable() before calling device_register() or
device_add(), e.g.:
device_set_removable(dev, DEVICE_REMOVABLE);
device_register(dev);
The possible values and the resulting sysfs attribute contents are:
DEVICE_REMOVABLE_UNKNOWN -> "unknown"
DEVICE_REMOVABLE -> "removable"
DEVICE_FIXED -> "fixed"
Convert the USB "removable" attribute to use this new device core
functionality. There should be no user-visible change in the location or
semantics of attribute for USB devices.
Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rajat Jain <rajatja@google.com>
Link: https://lore.kernel.org/r/20210524171812.18095-1-rajatja@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core changes from Greg KH:
"Here is the small set of driver core and debugfs updates for 5.14-rc1.
Included in here are:
- debugfs api cleanups (touched some drivers)
- devres updates
- tiny driver core updates and tweaks
Nothing major in here at all, and all have been in linux-next for a
while with no reported issues"
* tag 'driver-core-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (27 commits)
docs: ABI: testing: sysfs-firmware-memmap: add some memmap types.
devres: Enable trace events
devres: No need to call remove_nodes() when there none present
devres: Use list_for_each_safe_from() in remove_nodes()
devres: Make locking straight forward in release_nodes()
kernfs: move revalidate to be near lookup
drivers/base: Constify static attribute_group structs
firmware_loader: remove unneeded 'comma' macro
devcoredump: remove contact information
driver core: Drop helper devm_platform_ioremap_resource_wc()
component: Rename 'dev' to 'parent'
component: Drop 'dev' argument to component_match_realloc()
device property: Don't check for NULL twice in the loops
driver core: auxiliary bus: Fix typo in the docs
drivers/base/node.c: make CACHE_ATTR define static DEVICE_ATTR_RO
debugfs: remove return value of debugfs_create_ulong()
debugfs: remove return value of debugfs_create_bool()
scsi: snic: debugfs: remove local storage of debugfs files
b43: don't save dentries for debugfs
b43legacy: don't save dentries for debugfs
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In some cases the printf() mechanism is too heavy and can't be used.
For example, when debugging a race condition involving devres API.
When CONFIG_DEBUG_DEVRES is enabled I can't reproduce an issue, and
otherwise it's quite visible with a useful information being collected.
Enable trace events for devres part of the driver core.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210517122946.53161-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If a list of devres nodes is empty, no need to call remove_nodes().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210517122946.53161-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The remove_nodes() open codes the list_for_each_safe_from().
Replace it by a generic macro.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210517122946.53161-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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It seems for the sake of saving stack memory of couple of pointers,
the locking in release_nodes() callers becomes interesting.
Replace this logic with a straight forward locking and unlocking scheme.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210517122946.53161-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We need the driver core fix in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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These are only used by putting their address in an array of pointers to
const struct attribute_group (either directly or via the
__ATTRIBUTE_GROUP macro). Make them const to allow the compiler to place
them in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20210528213408.20067-1-rikard.falkeborn@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Commit 553671b76859 ("firmware_loader: Fix labels with comma for builtin
firmware") added this line, which was unneeded.
The macro 'comma' is defined in scripts/Kbuild.include.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20210528173404.169764-1-masahiroy@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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That email address hasn't existed for a long time, and the
mailing address is pretty useless; remove all of this.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20210528100314.d419f6e8e2d2.Ica8076036c755d6f782becd62d04c41361323130@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We need the driver core fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Since the macro was introduced in 2019 (commit bb6243b4f73d ("drivers:
platform: provide devm_platform_ioremap_resource_wc()") there is only a
single user which hardly justifies the function for the small task it
provides.
So drop the helper and open-code it in the only user. Adapt the non-wc
case accordingly.
For a all-mod-config build on amd64 this change introduces the following
changes according to bloat-o-meter:
add/remove: 0/1 grow/shrink: 1/0 up/down: 20/-252 (-232)
Function old new delta
devm_platform_ioremap_resource_wc 252 - -252
sram_probe 796 816 +20
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210525103711.956438-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Let's rename this struct member to 'parent' to better reflect the
reality that it's the parent device of this psuedo-device. In the next
patch we'll put a 'struct device' inside of this struct so moving this
away simplifies that patch by reducing the number of places that 'dev'
is modified.
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Saravana Kannan <saravanak@google.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20210520002519.3538432-3-swboyd@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This argument isn't used. Drop it.
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Saravana Kannan <saravanak@google.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20210520002519.3538432-2-swboyd@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In fwnode_get_next_available_child_node() we check next_child for NULL
twice. All the same in fwnode_get_next_parent_dev() we may avoid checking
fwnode for NULL twice.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210518064843.3524015-1-andy.shevchenko@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Mark DEVICE_ATTR_RO(name) in CACHE_ATTR(name, fmt)'s definition as static to fix
the following Sparse tool reports:
drivers/base/node.c:239:1: warning:
symbol 'dev_attr_line_size' was not declared. Should it be static?
drivers/base/node.c:240:1: warning:
symbol 'dev_attr_indexing' was not declared. Should it be static?
Where dev_attr_{line_size,indexing} are generated by CACHE_ATTR's expansion.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ruiqi Gong <gongruiqi1@huawei.com>
Link: https://lore.kernel.org/r/20210514020548.32483-1-gongruiqi1@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We need the driver core fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fix the following make W=1 kernel build warnings:
drivers/base/attribute_container.c:304: warning: Function parameter or member 'fn' not described in 'attribute_container_device_trigger_safe'
drivers/base/attribute_container.c:304: warning: Function parameter or member 'undo' not described in 'attribute_container_device_trigger_safe'
drivers/base/attribute_container.c:357: warning: Function parameter or member 'fn' not described in 'attribute_container_device_trigger'
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210512072233.3817056-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Using the right wrapper makes it easier to associate this assert
statement with the device_[un]lock() helpers.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Link: https://lore.kernel.org/r/20210512141054.2180373-1-jwi@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull VFIO updates from Alex Williamson:
- Module reference fixes, structure renaming (Max Gurtovoy)
- Export and use common pci_dev_trylock() (Luis Chamberlain)
- Enable direct mdev device creation and probing by parent (Christoph
Hellwig & Jason Gunthorpe)
- Fix mdpy error path leak (Colin Ian King)
- Fix mtty list entry leak (Jason Gunthorpe)
- Enforce mtty device limit (Alex Williamson)
- Resolve concurrent vfio-pci mmap faults (Alex Williamson)
* tag 'vfio-v5.14-rc1' of git://github.com/awilliam/linux-vfio:
vfio/pci: Handle concurrent vma faults
vfio/mtty: Enforce available_instances
vfio/mtty: Delete mdev_devices_list
vfio: use the new pci_dev_trylock() helper to simplify try lock
PCI: Export pci_dev_trylock() and pci_dev_unlock()
vfio/mdpy: Fix memory leak of object mdev_state->vconfig
vfio/iommu_type1: rename vfio_group struck to vfio_iommu_group
vfio/mbochs: Convert to use vfio_register_group_dev()
vfio/mdpy: Convert to use vfio_register_group_dev()
vfio/mtty: Convert to use vfio_register_group_dev()
vfio/mdev: Allow the mdev_parent_ops to specify the device driver to bind
vfio/mdev: Remove CONFIG_VFIO_MDEV_DEVICE
driver core: Export device_driver_attach()
driver core: Don't return EPROBE_DEFER to userspace during sysfs bind
driver core: Flow the return code from ->probe() through to sysfs bind
driver core: Better distinguish probe errors in really_probe
driver core: Pull required checks into driver_probe_device()
vfio/platform: remove unneeded parent_module attribute
vfio: centralize module refcount in subsystem layer
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This is intended as a replacement API for device_bind_driver(). It has at
least the following benefits:
- Internal locking. Few of the users of device_bind_driver() follow the
locking rules
- Calls device driver probe() internally. Notably this means that devm
support for probe works correctly as probe() error will call
devres_release_all()
- struct device_driver -> dev_groups is supported
- Simplified calling convention, no need to manually call probe().
The general usage is for situations that already know what driver to bind
and need to ensure the bind is synchronized with other logic. Call
device_driver_attach() after device_add().
If probe() returns a failure then this will be preserved up through to the
error return of device_driver_attach().
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20210617142218.1877096-6-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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EPROBE_DEFER is an internal kernel error code and it should not be leaked
to userspace via the bind_store() sysfs. Userspace doesn't have this
constant and cannot understand it.
Further, it doesn't really make sense to have userspace trigger a deferred
probe via bind_store(), which could eventually succeed, while
simultaneously returning an error back.
Resolve this by splitting driver_probe_device so that the version used
by the sysfs binding that turns EPROBE_DEFER into -EAGAIN, while the one
used for internally binding keeps the error code, and calls
driver_deferred_probe_add where needed. This also allows to nicely split
out the defer_all_probes / probe_count checks so that they actually allow
for full device_{block,unblock}_probing protection while not bothering
the sysfs bind case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20210617142218.1877096-5-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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Currently really_probe() returns 1 on success and 0 if the probe() call
fails. This return code arrangement is designed to be useful for
__device_attach_driver() which is walking the device list and trying every
driver. 0 means to keep trying.
However, it is not useful for the other places that call through to
really_probe() that do actually want to see the probe() return code.
For instance bind_store() would be better to return the actual error code
from the driver's probe method, not discarding it and returning -ENODEV.
Reorganize things so that really_probe() returns the error code from
->probe as a (inverted) positive number, and 0 for successful attach.
With this, __device_attach_driver can ignore the (positive) probe errors,
return 1 to exit the loop for a successful binding and pass on the
other negative errors, while device_driver_attach simplify inverts the
positive errors and returns all errors to the sysfs code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/r/20210617142218.1877096-4-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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really_probe tries to special case errors from ->probe, but due to all
other initialization added to the function over time now a lot of
internal errors hit that code path as well. Untangle that by adding
a new probe_err local variable and apply the special casing only to
that.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Link: https://lore.kernel.org/r/20210617142218.1877096-3-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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Checking if the dev is dead or if the dev is already bound is a required
precondition to invoking driver_probe_device(). All the call chains
leading here duplicate these checks.
Add it directly to driver_probe_device() so the precondition is clear and
remove the checks from device_driver_attach() and
__driver_attach_async_helper().
The other call chain going through __device_attach_driver() does have
these same checks but they are inlined into logic higher up the call stack
and can't be removed.
The sysfs uAPI call chain starting at bind_store() is a bit confused
because it reads dev->driver unlocked and returns -ENODEV if it is !NULL,
otherwise it reads it again under lock and returns 0 if it is !NULL. Fix
this to always return -EBUSY and always read dev->driver under its lock.
Done in preparation for the next patches which will add additional
callers to driver_probe_device() and will need these checks as well.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
[hch: drop the extra checks in device_driver_attach and bind_store]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/r/20210617142218.1877096-2-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull KUnit update from Shuah Khan:
"Fixes and features:
- add support for skipped tests
- introduce kunit_kmalloc_array/kunit_kcalloc() helpers
- add gnu_printf specifiers
- add kunit_shutdown
- add unit test for filtering suites by names
- convert lib/test_list_sort.c to use KUnit
- code organization moving default config to tools/testing/kunit
- refactor of internal parser input handling
- cleanups and updates to documentation
- code cleanup related to casts"
* tag 'linux-kselftest-kunit-fixes-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits)
kunit: add unit test for filtering suites by names
kasan: test: make use of kunit_skip()
kunit: test: Add example tests which are always skipped
kunit: tool: Support skipped tests in kunit_tool
kunit: Support skipped tests
thunderbolt: test: Reinstate a few casts of bitfields
kunit: tool: internal refactor of parser input handling
lib/test: convert lib/test_list_sort.c to use KUnit
kunit: introduce kunit_kmalloc_array/kunit_kcalloc() helpers
kunit: Remove the unused all_tests.config
kunit: Move default config from arch/um -> tools/testing/kunit
kunit: arch/um/configs: Enable KUNIT_ALL_TESTS by default
kunit: Add gnu_printf specifiers
lib/cmdline_kunit: Remove a cast which are no-longer required
kernel/sysctl-test: Remove some casts which are no-longer required
thunderbolt: test: Remove some casts which are no longer required
mmc: sdhci-of-aspeed: Remove some unnecessary casts from KUnit tests
iio: Remove a cast in iio-test-format which is no longer required
device property: Remove some casts in property-entry-test
Documentation: kunit: Clean up some string casts in examples
...
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With some of the stricter type checking in KUnit's EXPECT macros
removed, several casts in property-entry-test are no longer required.
Remove the unnecessary casts, making the conditions clearer.
Signed-off-by: David Gow <davidgow@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core:
- BPF:
- add syscall program type and libbpf support for generating
instructions and bindings for in-kernel BPF loaders (BPF loaders
for BPF), this is a stepping stone for signed BPF programs
- infrastructure to migrate TCP child sockets from one listener to
another in the same reuseport group/map to improve flexibility
of service hand-off/restart
- add broadcast support to XDP redirect
- allow bypass of the lockless qdisc to improving performance (for
pktgen: +23% with one thread, +44% with 2 threads)
- add a simpler version of "DO_ONCE()" which does not require jump
labels, intended for slow-path usage
- virtio/vsock: introduce SOCK_SEQPACKET support
- add getsocketopt to retrieve netns cookie
- ip: treat lowest address of a IPv4 subnet as ordinary unicast
address allowing reclaiming of precious IPv4 addresses
- ipv6: use prandom_u32() for ID generation
- ip: add support for more flexible field selection for hashing
across multi-path routes (w/ offload to mlxsw)
- icmp: add support for extended RFC 8335 PROBE (ping)
- seg6: add support for SRv6 End.DT46 behavior
- mptcp:
- DSS checksum support (RFC 8684) to detect middlebox meddling
- support Connection-time 'C' flag
- time stamping support
- sctp: packetization Layer Path MTU Discovery (RFC 8899)
- xfrm: speed up state addition with seq set
- WiFi:
- hidden AP discovery on 6 GHz and other HE 6 GHz improvements
- aggregation handling improvements for some drivers
- minstrel improvements for no-ack frames
- deferred rate control for TXQs to improve reaction times
- switch from round robin to virtual time-based airtime scheduler
- add trace points:
- tcp checksum errors
- openvswitch - action execution, upcalls
- socket errors via sk_error_report
Device APIs:
- devlink: add rate API for hierarchical control of max egress rate
of virtual devices (VFs, SFs etc.)
- don't require RCU read lock to be held around BPF hooks in NAPI
context
- page_pool: generic buffer recycling
New hardware/drivers:
- mobile:
- iosm: PCIe Driver for Intel M.2 Modem
- support for Qualcomm MSM8998 (ipa)
- WiFi: Qualcomm QCN9074 and WCN6855 PCI devices
- sparx5: Microchip SparX-5 family of Enterprise Ethernet switches
- Mellanox BlueField Gigabit Ethernet (control NIC of the DPU)
- NXP SJA1110 Automotive Ethernet 10-port switch
- Qualcomm QCA8327 switch support (qca8k)
- Mikrotik 10/25G NIC (atl1c)
Driver changes:
- ACPI support for some MDIO, MAC and PHY devices from Marvell and
NXP (our first foray into MAC/PHY description via ACPI)
- HW timestamping (PTP) support: bnxt_en, ice, sja1105, hns3, tja11xx
- Mellanox/Nvidia NIC (mlx5)
- NIC VF offload of L2 bridging
- support IRQ distribution to Sub-functions
- Marvell (prestera):
- add flower and match all
- devlink trap
- link aggregation
- Netronome (nfp): connection tracking offload
- Intel 1GE (igc): add AF_XDP support
- Marvell DPU (octeontx2): ingress ratelimit offload
- Google vNIC (gve): new ring/descriptor format support
- Qualcomm mobile (rmnet & ipa): inline checksum offload support
- MediaTek WiFi (mt76)
- mt7915 MSI support
- mt7915 Tx status reporting
- mt7915 thermal sensors support
- mt7921 decapsulation offload
- mt7921 enable runtime pm and deep sleep
- Realtek WiFi (rtw88)
- beacon filter support
- Tx antenna path diversity support
- firmware crash information via devcoredump
- Qualcomm WiFi (wcn36xx)
- Wake-on-WLAN support with magic packets and GTK rekeying
- Micrel PHY (ksz886x/ksz8081): add cable test support"
* tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2168 commits)
tcp: change ICSK_CA_PRIV_SIZE definition
tcp_yeah: check struct yeah size at compile time
gve: DQO: Fix off by one in gve_rx_dqo()
stmmac: intel: set PCI_D3hot in suspend
stmmac: intel: Enable PHY WOL option in EHL
net: stmmac: option to enable PHY WOL with PMT enabled
net: say "local" instead of "static" addresses in ndo_dflt_fdb_{add,del}
net: use netdev_info in ndo_dflt_fdb_{add,del}
ptp: Set lookup cookie when creating a PTP PPS source.
net: sock: add trace for socket errors
net: sock: introduce sk_error_report
net: dsa: replay the local bridge FDB entries pointing to the bridge dev too
net: dsa: ensure during dsa_fdb_offload_notify that dev_hold and dev_put are on the same dev
net: dsa: include fdb entries pointing to bridge in the host fdb list
net: dsa: include bridge addresses which are local in the host fdb list
net: dsa: sync static FDB entries on foreign interfaces to hardware
net: dsa: install the host MDB and FDB entries in the master's RX filter
net: dsa: reference count the FDB addresses at the cross-chip notifier level
net: dsa: introduce a separate cross-chip notifier type for host FDBs
net: dsa: reference count the MDB entries at the cross-chip notifier level
...
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Trivial conflicts in net/can/isotp.c and
tools/testing/selftests/net/mptcp/mptcp_connect.sh
scaled_ppm_to_ppb() was moved from drivers/ptp/ptp_clock.c
to include/linux/ptp_clock_kernel.h in -next so re-apply
the fix there.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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There are many places where both the fwnode_handle and the of_node of a
device need to be populated. Add a function which does both so that we
have consistency.
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge misc updates from Andrew Morton:
"191 patches.
Subsystems affected by this patch series: kthread, ia64, scripts,
ntfs, squashfs, ocfs2, kernel/watchdog, and mm (gup, pagealloc, slab,
slub, kmemleak, dax, debug, pagecache, gup, swap, memcg, pagemap,
mprotect, bootmem, dma, tracing, vmalloc, kasan, initialization,
pagealloc, and memory-failure)"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (191 commits)
mm,hwpoison: make get_hwpoison_page() call get_any_page()
mm,hwpoison: send SIGBUS with error virutal address
mm/page_alloc: split pcp->high across all online CPUs for cpuless nodes
mm/page_alloc: allow high-order pages to be stored on the per-cpu lists
mm: replace CONFIG_FLAT_NODE_MEM_MAP with CONFIG_FLATMEM
mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA
docs: remove description of DISCONTIGMEM
arch, mm: remove stale mentions of DISCONIGMEM
mm: remove CONFIG_DISCONTIGMEM
m68k: remove support for DISCONTIGMEM
arc: remove support for DISCONTIGMEM
arc: update comment about HIGHMEM implementation
alpha: remove DISCONTIGMEM and NUMA
mm/page_alloc: move free_the_page
mm/page_alloc: fix counting of managed_pages
mm/page_alloc: improve memmap_pages dbg msg
mm: drop SECTION_SHIFT in code comments
mm/page_alloc: introduce vm.percpu_pagelist_high_fraction
mm/page_alloc: limit the number of pages on PCP lists when reclaim is active
mm/page_alloc: scale the number of pages that are batch freed
...
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NUMA statistics are maintained on the zone level for hits, misses, foreign
etc but nothing relies on them being perfectly accurate for functional
correctness. The counters are used by userspace to get a general overview
of a workloads NUMA behaviour but the page allocator incurs a high cost to
maintain perfect accuracy similar to what is required for a vmstat like
NR_FREE_PAGES. There even is a sysctl vm.numa_stat to allow userspace to
turn off the collection of NUMA statistics like NUMA_HIT.
This patch converts NUMA_HIT and friends to be NUMA events with similar
accuracy to VM events. There is a possibility that slight errors will be
introduced but the overall trend as seen by userspace will be similar.
The counters are no longer updated from vmstat_refresh context as it is
unnecessary overhead for counters that may never be read by userspace.
Note that counters could be maintained at the node level to save space but
it would have a user-visible impact due to /proc/zoneinfo.
[lkp@intel.com: Fix misplaced closing brace for !CONFIG_NUMA]
Link: https://lkml.kernel.org/r/20210512095458.30632-4-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull device properties framework updates from Rafael Wysocki:
"These unify device properties access in some pieces of code and make
related changes.
Specifics:
- Handle device properties with software node API in the ACPI IORT
table parsing code (Heikki Krogerus).
- Unify of_node access in the common device properties code, constify
the acpi_dma_supported() argument pointer and fix up CONFIG_ACPI=n
stubs of some functions related to device properties (Andy
Shevchenko)"
* tag 'devprop-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
device property: Unify access to of_node
ACPI: scan: Constify acpi_dma_supported() helper function
ACPI: property: Constify stubs for CONFIG_ACPI=n case
ACPI: IORT: Handle device properties with software node API
device property: Retrieve fwnode from of_node via accessor
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Historically we have a few variants how we access dev->fwnode
and dev->of_node. Some of the functions during development
gained different versions of the getters. Unify access to of_node
and as a side change slightly refactor ACPI specific branches.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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OF provides a specific accessor to retrieve fwnode handle.
Use it instead of direct dereferencing.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"These add hybrid processors support to the intel_pstate driver and
make it work with more processor models when HWP is disabled, make the
intel_idle driver use special C6 idle state paremeters when package
C-states are disabled, add cooling support to the tegra30 devfreq
driver, rework the TEO (timer events oriented) cpuidle governor,
extend the OPP (operating performance points) framework to use the
required-opps DT property in more cases, fix some issues and clean up
a number of assorted pieces of code.
Specifics:
- Make intel_pstate support hybrid processors using abstract
performance units in the HWP interface (Rafael Wysocki).
- Add Icelake servers and Cometlake support in no-HWP mode to
intel_pstate (Giovanni Gherdovich).
- Make cpufreq_online() error path be consistent with the CPU device
removal path in cpufreq (Rafael Wysocki).
- Clean up 3 cpufreq drivers and the statistics code (Hailong Liu,
Randy Dunlap, Shaokun Zhang).
- Make intel_idle use special idle state parameters for C6 when
package C-states are disabled (Chen Yu).
- Rework the TEO (timer events oriented) cpuidle governor to address
some theoretical shortcomings in it (Rafael Wysocki).
- Drop unneeded semicolon from the TEO governor (Wan Jiabing).
- Modify the runtime PM framework to accept unassigned suspend and
resume callback pointers (Ulf Hansson).
- Improve pm_runtime_get_sync() documentation (Krzysztof Kozlowski).
- Improve device performance states support in the generic power
domains (genpd) framework (Ulf Hansson).
- Fix some documentation issues in genpd (Yang Yingliang).
- Make the operating performance points (OPP) framework use the
required-opps DT property in use cases that are not related to
genpd (Hsin-Yi Wang).
- Make lazy_link_required_opp_table() use list_del_init instead of
list_del/INIT_LIST_HEAD (Yang Yingliang).
- Simplify wake IRQs handling in the core system-wide sleep support
code and clean up some coding style inconsistencies in it (Tian
Tao, Zhen Lei).
- Add cooling support to the tegra30 devfreq driver and improve its
DT bindings (Dmitry Osipenko).
- Fix some assorted issues in the devfreq core and drivers (Chanwoo
Choi, Dong Aisheng, YueHaibing)"
* tag 'pm-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (39 commits)
PM / devfreq: passive: Fix get_target_freq when not using required-opp
cpufreq: Make cpufreq_online() call driver->offline() on errors
opp: Allow required-opps to be used for non genpd use cases
cpuidle: teo: remove unneeded semicolon in teo_select()
dt-bindings: devfreq: tegra30-actmon: Add cooling-cells
dt-bindings: devfreq: tegra30-actmon: Convert to schema
PM / devfreq: userspace: Use DEVICE_ATTR_RW macro
PM: runtime: Clarify documentation when callbacks are unassigned
PM: runtime: Allow unassigned ->runtime_suspend|resume callbacks
PM: runtime: Improve path in rpm_idle() when no callback
PM: hibernate: remove leading spaces before tabs
PM: sleep: remove trailing spaces and tabs
PM: domains: Drop/restore performance state votes for devices at runtime PM
PM: domains: Return early if perf state is already set for the device
PM: domains: Split code in dev_pm_genpd_set_performance_state()
cpuidle: teo: Use kerneldoc documentation in admin-guide
cpuidle: teo: Rework most recent idle duration values treatment
cpuidle: teo: Change the main idle state selection logic
cpuidle: teo: Cosmetic modification of teo_select()
cpuidle: teo: Cosmetic modifications of teo_update()
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* pm-domains:
PM: domains: Drop/restore performance state votes for devices at runtime PM
PM: domains: Return early if perf state is already set for the device
PM: domains: Split code in dev_pm_genpd_set_performance_state()
PM: domains: fix some kernel-doc issues
* pm-devfreq:
PM / devfreq: passive: Fix get_target_freq when not using required-opp
dt-bindings: devfreq: tegra30-actmon: Add cooling-cells
dt-bindings: devfreq: tegra30-actmon: Convert to schema
PM / devfreq: userspace: Use DEVICE_ATTR_RW macro
PM / devfreq: imx8m-ddrc: Remove DEVFREQ_GOV_SIMPLE_ONDEMAND dependency
PM / devfreq: tegra30: Support thermal cooling
PM / devfreq: imx-bus: Remove imx_bus_get_dev_status
PM / devfreq: Add missing error code in devfreq_add_device()
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A subsystem/driver that need to manage OPPs for its device, should
typically drop its vote for the OPP when the device becomes runtime
suspended. In this way, the corresponding aggregation of the performance
state votes that is managed in genpd for the attached PM domain, may find
that the aggregated vote can be decreased. Hence, it may allow genpd to set
the lower performance state for the PM domain, thus avoiding to waste
energy.
To accomplish this, typically a subsystem/driver would need to call
dev_pm_opp_set_rate|opp() for its device from its ->runtime_suspend()
callback, to drop the vote for the OPP. Accordingly, it needs another call
to dev_pm_opp_set_rate|opp() to restore the vote for the OPP from its
->runtime_resume() callback.
To avoid boilerplate code in subsystems/driver to deal with these things,
let's instead manage this internally in genpd.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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When dev_pm_genpd_set_performance_state() gets called to set a new
performance state for the device, let's take a quicker path by doing an
early return, if it turns out that the new state is already set for the
device.
Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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To prepare some of the code in dev_pm_genpd_set_performance_state() to be
re-used from subsequent changes, let's split it up into two functions.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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