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* irq: make variable staticroel kluin2008-10-221-1/+1
| | | | | | | This variable is only used in the source file, so make it static. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* genirq: NULL struct irq_desc's member 'name' in dynamic_irq_cleanup()Dean Nelson2008-10-211-0/+1
| | | | | | | | | | | | | | | | | | If the member 'name' of the irq_desc structure happens to point to a character string that is resident within a kernel module, problems ensue if that module is rmmod'd (at which time dynamic_irq_cleanup() is called) and then later show_interrupts() is called by someone. It is also not a good thing if the character string resided in kmalloc'd space that has been kfree'd (after having called dynamic_irq_cleanup()). dynamic_irq_cleanup() fails to NULL the 'name' member and show_interrupts() references it on a few architectures (like h8300, sh and x86). Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* genirq: fix set_irq_type() when recording trigger typeChris Friesen2008-10-211-1/+1
| | | | | | | | | | | | Impact: fix boot hang on a G5 In set_irq_type() we want to pass the type rather than the current interrupt state. Signed-off-by: Chris Friesen <cfriesen@nortel.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* genirq: fix name space collision of nr_irqs in autoprobe.cThomas Gleixner2008-10-161-4/+4
| | | | | | | | probe_irq_off() is disfunctional as the local nr_irqs is referenced instead of the global one for the for_each_irq_desc() iterator. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: use iterators for irq_desc loopsThomas Gleixner2008-10-162-35/+15
| | | | | | Use for_each_irq_desc[_reverse] for all the iteration loops. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: cleanup the sparseirq modificationsThomas Gleixner2008-10-165-55/+48
| | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: revert dynarrayThomas Gleixner2008-10-162-130/+14
| | | | | | Revert the dynarray changes. They need more thought and polishing. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: remove irq_to_desc_allocThomas Gleixner2008-10-161-1/+1
| | | | | | Remove the leftover of sparseirqs. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: remove sparse irq codeThomas Gleixner2008-10-161-114/+0
| | | | | | | This code is not ready, but we need to rip it out instead of rebasing as we would lose the APIC/IO_APIC unification otherwise. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: use inline function for irq_to_descThomas Gleixner2008-10-161-14/+0
| | | | | | For the non sparse irq case an inline function is perfectly fine. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: fix typo in irq_desc arrayYinghai Lu2008-10-161-1/+1
| | | | | | | when SPARSE_IRQ is not used, should still use irq_desc->lock Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* fix warning: "x86: sparse_irq needs spin_lock in allocations"Andrew Morton2008-10-161-2/+1
| | | | | | | | | | | | | caused by commit a532e19680ada3b8579b81e67e76d3ebd19c340f Author: Yinghai Lu <yhlu.kernel@gmail.com> Date: Wed Aug 20 20:46:25 2008 -0700 x86: sparse_irq needs spin_lock in allocations Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sparseirq: remove some debug print outYinghai Lu2008-10-161-18/+0
| | | | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: fix irqpoll && sparseirqYinghai Lu2008-10-161-6/+11
| | | | | | | | | | | | | Steven Noonan reported a boot hang when using irqpoll and CONFIG_HAVE_SPARSE_IRQ=y. The irqpoll loop needs to be updated to not iterate from 1 to nr_irqs but to iterate via for_each_irq_desc(). (in the former case desc can be NULL which crashes the box) Reported-by: Steven Noonan <steven@uplinklabs.net> Tested-by: Steven Noonan <steven@uplinklabs.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: HPET_MSI change IRQ affinity in process context when it is disabledvenkatesh.pallipadi@intel.com2008-10-161-1/+2
| | | | | | | | Change the IRQ affinity in the process context when the IRQ is disabled. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: set_irq_chip() has redundant call to irq_to_desc()Dean Nelson2008-10-161-1/+0
| | | | | | | | Extraneous call to irq_to_desc(). Signed-off-by: Dean Nelson <dcn@sgi.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sparseirq: move kstat_irqs from kstat to irq_desc - fixYinghai Lu2008-10-162-1/+30
| | | | | | | fix non-sparseirq architectures. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: sparse_irq needs spin_lock in allocationsYinghai Lu2008-10-161-1/+12
| | | | | | | Suresh Siddha noticed that we should have a spinlock around it. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sparseirq: fix lockdepIngo Molnar2008-10-161-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | -tip testing found this lockdep splat: [ 0.000000] Initializing CPU#0 [ 0.000000] found new irq_desc for irq 0 [ 0.000000] INFO: trying to register non-static key. [ 0.000000] the code is fine but needs lockdep annotation. [ 0.000000] turning off the locking correctness validator. [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.27-rc3-tip-00191-g98ccb89-dirty #1 [ 0.000000] [<c0153c22>] register_lock_class+0x3d2/0x400 [ 0.000000] [<c0104d87>] ? mcount_call+0x5/0xa [ 0.000000] [<c0154f3a>] __lock_acquire+0x22a/0x5d0 [ 0.000000] [<c0104d87>] ? mcount_call+0x5/0xa [ 0.000000] [<c0155351>] lock_acquire+0x71/0xa0 [ 0.000000] [<c016d61f>] ? set_irq_chip+0x3f/0x90 [ 0.000000] [<c070f148>] _spin_lock_irqsave+0x58/0x90 [ 0.000000] [<c016d61f>] ? set_irq_chip+0x3f/0x90 [ 0.000000] [<c016d61f>] set_irq_chip+0x3f/0x90 [ 0.000000] [<c016d7e0>] ? handle_level_irq+0x0/0xe0 [ 0.000000] [<c016da1a>] set_irq_chip_and_handler_name+0x1a/0x40 [ 0.000000] [<c0a396c1>] init_ISA_irqs+0x51/0xa0 [ 0.000000] [<c0a4a365>] pre_intr_init_hook+0x25/0x30 [ 0.000000] [<c0a39723>] native_init_IRQ+0x13/0x370 [ 0.000000] [<c015569c>] ? lock_release+0xcc/0x1d0 [ 0.000000] [<c0104d87>] ? mcount_call+0x5/0xa [ 0.000000] [<c070dc22>] ? __mutex_unlock_slowpath+0x92/0x110 [ 0.000000] [<c070dcad>] ? mutex_unlock+0xd/0x10 [ 0.000000] [<c0135f62>] ? cpu_maps_update_done+0x12/0x20 [ 0.000000] [<c06c6743>] ? register_cpu_notifier+0x23/0x30 [ 0.000000] [<c011e8ae>] init_IRQ+0xe/0x10 [ 0.000000] [<c0a357a5>] start_kernel+0x1c5/0x340 [ 0.000000] [<c0a35280>] ? unknown_bootoption+0x0/0x210 [ 0.000000] [<c0a3506b>] i386_start_kernel+0x6b/0x80 [ 0.000000] ======================= [ 0.000000] found new irq_desc for irq 1 [ 0.000000] found new irq_desc for irq 2 [ 0.000000] found new irq_desc for irq 3 this: static void init_one_irq_desc(struct irq_desc *desc) { memcpy(desc, &irq_desc_init, sizeof(struct irq_desc)); #ifdef CONFIG_TRACE_IRQFLAGS lockdep_set_class(&desc->lock, &irq_desc_lock_class); #endif } should be unconditional. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: remove irqbalance in kernel for 32 bitYinghai Lu2008-10-161-3/+0
| | | | | | | | This has been deprecated for years, the user space irqbalanced utility works better with numa, has configurable policies, etc... Signed-off-by: Yinghai Lu <yhlu.kernel@gmai.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: separate sparse_irqs from sparse_irqs_freeYinghai Lu2008-10-161-54/+61
| | | | | | | so later don't need compare with -1U Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86_64: rename irq_desc/irq_desc_allocYinghai Lu2008-10-163-36/+24
| | | | | | | | | | | | | | change names: irq_desc() ==> irq_desc_alloc __irq_desc() ==> irq_desc Also split a few of the uses in lowlevel x86 code. v2: need to check if desc is null in smp_irq_move_cleanup Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* generic: add irq_desc in function in parameterYinghai Lu2008-10-161-0/+30
| | | | | | | | | So we could remove some duplicated calling to irq_desc v2: make sure irq_desc in init/main.c is not used without generic_hardirqs Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: remove >= nr_irqs checking with config_have_sparse_irqYinghai Lu2008-10-162-38/+54
| | | | | | | | | | remove irq limit checks - nr_irqs is dynamic and we expand anytime. v2: fix checking about result irq_cfg_without_new, so could use msi again v3: use irq_desc_without_new to check irq is valid Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: replace loop with nr_irqs with for_each_irq_descYinghai Lu2008-10-163-8/+8
| | | | | | | | | | | | | | There are a handful of loops that go from 0 to nr_irqs and use get_irq_desc() on them. These would allocate all the irq_desc entries, regardless of the need for them. Use the smarter for_each_irq_desc() iterator that will only iterate over the present ones. v2: make sure arch without GENERIC_HARDIRQS work too Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: add irq_desc_without_newYinghai Lu2008-10-161-4/+24
| | | | | | | | add an irq_desc accessor that will not allocate any sparse entry but returns failure if there's no entry present. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move kstat_irqs from kstat to irq_descYinghai Lu2008-10-162-37/+75
| | | | | | | | | | | | | | | | | | | | | based on Eric's patch ... together mold it with dyn_array for irq_desc, will allcate kstat_irqs for nr_irq_desc alltogether if needed. -- at that point nr_cpus is known already. v2: make sure system without generic_hardirqs works they don't have irq_desc v3: fix merging v4: [mingo@elte.hu] fix typo [ mingo@elte.hu ] irq: build fix fix: arch/x86/xen/spinlock.c: In function 'xen_spin_lock_slow': arch/x86/xen/spinlock.c:90: error: 'struct kernel_stat' has no member named 'irqs' Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: sparse irqs, fix IRQ auto-probe crashIngo Molnar2008-10-161-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fix: [ 10.631533] calling yenta_socket_init+0x0/0x20 [ 10.631533] Yenta: CardBus bridge found at 0000:15:00.0 [17aa:2012] [ 10.631533] Yenta: Using INTVAL to route CSC interrupts to PCI [ 10.631533] Yenta: Routing CardBus interrupts to PCI [ 10.631533] Yenta TI: socket 0000:15:00.0, mfunc 0x01d01002, devctl 0x64 [ 10.731599] BUG: unable to handle kernel NULL pointer dereference at 00000040 [ 10.731838] IP: [<c0c95b5f>] _spin_lock_irq+0xf/0x20 [ 10.732221] *pde = 00000000 [ 10.732741] Oops: 0002 [#1] SMP [ 10.733453] [ 10.734253] Pid: 1, comm: swapper Tainted: G W (2.6.27-rc3-tip-00173-gd7eaa4f-dirty #1) [ 10.735188] EIP: 0060:[<c0c95b5f>] EFLAGS: 00010002 CPU: 0 [ 10.735523] EIP is at _spin_lock_irq+0xf/0x20 [ 10.735523] EAX: 00000040 EBX: 00000000 ECX: f6e04c90 EDX: 00000100 [ 10.735523] ESI: 000000df EDI: f6e04c90 EBP: f7867df0 ESP: f7867df0 [ 10.735523] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 10.735523] Process swapper (pid: 1, ti=f7867000 task=f7870000 task.ti=f7867000) [ 10.735523] Stack: f7867e04 c0155fbd 00000000 00000000 f6e04c90 f7867e5c c0c6e319 c0f6a074 [ 10.735523] f6e04c90 000017aa 00002012 c112b648 f791f240 c112b5e0 f7867e44 c010440b [ 10.735523] f791f240 f791f29c c112b8ec f791f240 00000000 f7867e5c c048f893 03c0b648 [ 10.735523] Call Trace: [ 10.735523] [<c0155fbd>] ? probe_irq_on+0x3d/0x140 [ 10.735523] [<c0c6e319>] ? yenta_probe+0x529/0x640 [ 10.735523] [<c010440b>] ? mcount_call+0x5/0xa [ 10.735523] [<c048f893>] ? pci_match_device+0xa3/0xb0 [ 10.735523] [<c048fc1e>] ? pci_device_probe+0x5e/0x80 [ 10.735523] [<c0515423>] ? driver_probe_device+0x83/0x180 [ 10.735523] [<c0515594>] ? __driver_attach+0x74/0x80 [ 10.735523] [<c0514b69>] ? bus_for_each_dev+0x49/0x70 [ 10.735523] [<c051528e>] ? driver_attach+0x1e/0x20 [ 10.735523] [<c0515520>] ? __driver_attach+0x0/0x80 [ 10.735523] [<c05150d3>] ? bus_add_driver+0x1a3/0x220 [ 10.735523] [<c048fb60>] ? pci_device_remove+0x0/0x40 [ 10.735523] [<c05157f4>] ? driver_register+0x54/0x130 [ 10.735523] [<c048fe2f>] ? __pci_register_driver+0x4f/0x90 [ 10.735523] [<c11e9419>] ? yenta_socket_init+0x19/0x20 [ 10.735523] [<c0101125>] ? do_one_initcall+0x35/0x160 [ 10.735523] [<c11e9400>] ? yenta_socket_init+0x0/0x20 [ 10.735523] [<c01391a6>] ? __queue_work+0x36/0x50 [ 10.735523] [<c013922d>] ? queue_work_on+0x3d/0x50 [ 10.735523] [<c11a2758>] ? kernel_init+0x148/0x210 [ 10.735523] [<c11a2610>] ? kernel_init+0x0/0x210 [ 10.735523] [<c01043f3>] ? kernel_thread_helper+0x7/0x10 [ 10.735523] ======================= [ 10.735523] Code: 10 38 f2 74 06 f3 90 8a 10 eb f6 5d 89 c8 c3 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 e8 a4 e8 46 ff fa ba 00 01 00 00 90 <66> 0f c1 10 38 f2 74 06 f3 90 8a 10 eb f6 5d c3 90 55 89 e5 53 as auto-probing wants to iterate over existing irqs. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* generic: sparse irqs: use irq_desc() together with dyn_array, instead of ↵Yinghai Lu2008-10-168-73/+199
| | | | | | | | | | | | | | | | | | irq_desc[] add CONFIG_HAVE_SPARSE_IRQ to for use condensed array. Get rid of irq_desc[] array assumptions. Preallocate 32 irq_desc, and irq_desc() will try to get more. ( No change in functionality is expected anywhere, except the odd build failure where we missed a code site or where a crossing commit itroduces new irq_desc[] usage. ) v2: according to Eric, change get_irq_desc() to irq_desc() Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: sparse irqs, export nr_irqsIngo Molnar2008-10-161-0/+1
| | | | | | | | | | fix: Building modules, stage 2. MODPOST 458 modules ERROR: "nr_irqs" [drivers/serial/8250.ko] undefined! Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: make irq_desc to use dyn_arrayYinghai Lu2008-10-161-0/+31
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* irq: introduce nr_irqsYinghai Lu2008-10-167-29/+30
| | | | | | | | | | | at this point nr_irqs is equal NR_IRQS convert a few easy users from NR_IRQS to dynamic nr_irqs. v2: according to Eric, we need to take care of arch without generic_hardirqs Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'linus' into genirqIngo Molnar2008-10-161-1/+8
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| * Merge branch 'linus' into x86/coreIngo Molnar2008-08-142-46/+53
| |\ | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/genapic_64.c include/asm-x86/kvm_host.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * \ Merge commit 'v2.6.27-rc1' into x86/coreIngo Molnar2008-07-302-10/+5
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: include/asm-x86/dma-mapping.h include/asm-x86/namei.h include/asm-x86/uaccess.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * \ \ Merge branch 'x86/x2apic' into x86/coreIngo Molnar2008-07-261-1/+8
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: include/asm-x86/i8259.h include/asm-x86/msidef.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * \ \ Merge branch 'linus' into x86/x2apicIngo Molnar2008-07-251-34/+69
| | |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/pci/dmar.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * \ \ \ Merge branch 'linus' into x86/x2apicIngo Molnar2008-07-182-9/+83
| | |\ \ \ \
| | * | | | | x64, x2apic/intr-remap: generic irq migration support from process contextSuresh Siddha2008-07-121-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generic infrastructure for migrating the irq from the process context in the presence of CONFIG_GENERIC_PENDING_IRQ. This will be used later for migrating irq in the presence of interrupt-remapping. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: akpm@linux-foundation.org Cc: arjan@linux.intel.com Cc: andi@firstfloor.org Cc: ebiederm@xmission.com Cc: jbarnes@virtuousgeek.org Cc: steiner@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | | genirq: record trigger typeDavid Brownell2008-10-023-10/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Genirq hasn't previously recorded the trigger type used by any given IRQ, although some irq_chip support has done so. That data can be useful when troubleshooting. This patch records it in the relevant irq_desc.status bits, and improves consistency between the two driver-visible calls affected: - Make set_irq_type() usage match request_irq() usage: * IRQ_TYPE_NONE should be a NOP; succeed, so irq_chip methods won't have to handle that case any more (many do it wrong). * IRQ_TYPE_PROBE is ignored; any buggy out-of-tree callers might need to switch over to the real IRQ probing code. * emit the same diagnostics (from shared utility code) - Their kerneldoc now reflects usage: * request_irq() flags include IRQF_TRIGGER_* to specify active edge(s)/level ... docs previously omitted that * set_irq_type() is declared in <linux/irq.h> so callers should use the (bit-equivalent) IRQ_TYPE_* symbols there Also: adds a warning about shared IRQs that don't end up using the requested trigger mode; and fix an unrelated "sparse" warning. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | | Merge commit 'v2.6.27-rc8' into genirqIngo Molnar2008-10-023-92/+127
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| * | | | | | genirq: switch /proc/irq/*/smp_affinity et al to seqfilesAlexey Dobriyan2008-08-121-45/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Switch /proc/irq/*/smp_affinity , /proc/irq/default_smp_affinity to seq_files. cat(1) reads with 1024 chunks by default, with high enough NR_CPUS, there will be -EINVAL. As side effect, there are now two less users of the ->read_proc interface. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Paul Jackson <pj@sgi.com> Cc: Mike Travis <travis@sgi.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | | genirq: better warning on irqchip->set_type() failureDavid Brownell2008-08-051-1/+2
| | |_|_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While I'm glad to finally see the hole fixed whereby passing an invalid IRQ trigger type to request_irq() would be ignored, the current diagnostic isn't quite useful. Fixed by also listing the trigger type which was rejected. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | use WARN() in kernel/irq/chip.cArjan van de Ven2008-07-261-8/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use WARN() instead of a printk+WARN_ON() pair; this way the message becomes part of the warning section for better reporting/collection. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | Use WARN() in kernel/irq/manage.cArjan van de Ven2008-07-261-2/+1
| |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace a printk+WARN_ON() by a WARN(); this increases the chance of the string making it into the bugreport (ie: it goes inside the ---[ cut here ]--- section) Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | / kernel/irq/manage.c: replace a printk + WARN_ON() to a WARN()Arjan van de Ven2008-07-251-3/+1
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace a printk+WARN_ON() by a WARN(); this increases the chance of the string making it into the bugreport (ie: it goes inside the ---[ cut here ]--- section) Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | generic irqs: handle failure of irqchip->set_type in setup_irqUwe Kleine-König2008-07-241-22/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | set_type returns an int indicating success or failure, but up to now setup_irq ignores that. In my case this resulted in a machine hang: gpio-keys requested IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, but arm/ns9xxx can only trigger on one direction so set_type didn't touch the configuration which happens do default to a level sensitiveness and returned -EINVAL. setup_irq ignored that and unmasked the irq. This resulted in an endless triggering of the gpio-key interrupt service routine which effectively killed the machine. With this patch applied setup_irq propagates the error to the caller. Note that before in the case chip && !chip->set_type && !chip->name a NULL pointer was feed to printk. This is fixed, too. Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | set_irq_wake: fix return code and wake status trackingUwe Kleine-König2008-07-231-12/+27
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since 15a647eba94c3da27ccc666bea72e7cca06b2d19 set_irq_wake returned -ENXIO if another device had it already enabled. Zero is the right value to return in this case. Moreover the change to desc->status was not reverted if desc->chip->set_wake returned an error. Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | genirq: irq_chip->startup() usage in setup_irq and set_irq_chained handlerPawel MOLL2008-09-062-5/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch clarifies usage of irq_chip->startup() callback: 1. The "if (startup) startup(); else enabled();" code in setup_irq() is unnecessary, as startup() falls back to enabled() via default callbacks, set by irq_chip_set_defaults(). 2. When using set_irq_chained_handler() the startup() was never called, which is not good at all... Fixed. And again - when startup() is not defined the call will fall back to enable() than to unmask() via default callbacks. Signed-off-by: Pawel Moll <pawel.moll@st.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | genirq: fix irq_desc->depth handling with DEBUG_SHIRQAnton Vorontsov2008-08-221-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When DEBUG_SHIRQ is selected, a spurious IRQ is issued before the setup_irq() initializes the desc->depth. An IRQ handler may call disable_irq_nosync(), but then setup_irq() will overwrite desc->depth, and upon enable_irq() we'll catch this WARN: ------------[ cut here ]------------ Badness at kernel/irq/manage.c:180 NIP: c0061ab8 LR: c0061f10 CTR: 00000000 REGS: cf83be50 TRAP: 0700 Not tainted (2.6.27-rc3-23450-g74919b0) MSR: 00021032 <ME,IR,DR> CR: 22042022 XER: 20000000 TASK = cf829100[5] 'events/0' THREAD: cf83a000 GPR00: c0061f10 cf83bf00 cf829100 c038e674 00000016 00000000 cf83bef8 00000038 GPR08: c0298910 00000000 c0310d28 cf83a000 00000c9c 1001a1a8 0fffe000 00800000 GPR16: ffffffff 00000000 007fff00 00000000 007ffeb0 c03320a0 c031095c c0310924 GPR24: cf8292ec cf807190 cf83a000 00009032 c038e6a4 c038e674 cf99b1cc c038e674 NIP [c0061ab8] __enable_irq+0x20/0x80 LR [c0061f10] enable_irq+0x50/0x70 Call Trace: [cf83bf00] [c038e674] irq_desc+0x630/0x9000 (unreliable) [cf83bf10] [c0061f10] enable_irq+0x50/0x70 [cf83bf30] [c01abe94] phy_change+0x68/0x108 [cf83bf50] [c0046394] run_workqueue+0xc4/0x16c [cf83bf90] [c0046834] worker_thread+0x74/0xd4 [cf83bfd0] [c004ab7c] kthread+0x48/0x84 [cf83bff0] [c00135e0] kernel_thread+0x44/0x60 Instruction dump: 4e800020 3d20c031 38a94214 4bffffcc 9421fff0 7c0802a6 93e1000c 7c7f1b78 90010014 8123001c 2f890000 409e001c <0fe00000> 80010014 83e1000c 38210010 That trace corresponds to this line: WARN(1, KERN_WARNING "Unbalanced enable for IRQ %d\n", irq); The patch fixes the problem by moving the SHIRQ code below the setup_irq(). Unfortunately we can't easily move the SHIRQ code inside the setup_irq(), since it grabs a spinlock, so to prvent a 'real' IRQ from interfere us we should disable that IRQ. p.s. The driver in question is drivers/net/phy/phy.c. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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