diff options
author | Zhang Rui <rui.zhang@intel.com> | 2015-08-24 15:27:11 -0500 |
---|---|---|
committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-08-24 15:27:11 -0500 |
commit | 91f15fb30c77d4a0d0d9b97e5cec647650853145 (patch) | |
tree | 8b8fd59b94906421d82e9fbc5d2a6b71693fb372 /drivers/pci/pci.c | |
parent | 24b390aad2930b889b6e15fc7cf7bfa7c99fad21 (diff) | |
download | linux-stable-91f15fb30c77d4a0d0d9b97e5cec647650853145.tar.gz linux-stable-91f15fb30c77d4a0d0d9b97e5cec647650853145.tar.bz2 linux-stable-91f15fb30c77d4a0d0d9b97e5cec647650853145.zip |
PCI: Disable async suspend/resume for JMicron multi-function SATA/AHCI
On multi-function JMicron SATA/PATA/AHCI devices, the PATA controller at
function 1 doesn't work if it is powered on before the SATA controller at
function 0. The result is that PATA doesn't work after resume, and we
print messages like this:
pata_jmicron 0000:02:00.1: Refused to change power state, currently in D3
irq 17: nobody cared (try booting with the "irqpoll" option)
Async resume was introduced in v3.15 by 76569faa62c4 ("PM / sleep:
Asynchronous threads for resume_noirq"). Prior to that, we powered on
the functions in order, so this problem shouldn't happen.
e6b7e41cdd8c ("ata: Disabling the async PM for JMicron chip 363/361")
solved the problem for JMicron 361 and 363 devices. With async suspend
disabled, we always power on function 0 before function 1.
Barto then reported the same problem with a JMicron 368 (see comment #57 in
the bugzilla).
Rather than extending the blacklist piecemeal, disable async suspend for
all JMicron multi-function SATA/PATA/AHCI devices.
This quirk could stay in the ahci and pata_jmicron drivers, but it's likely
the problem will occur even if pata_jmicron isn't loaded until after the
suspend/resume. Making it a PCI quirk ensures that we'll preserve the
power-on order even if the drivers aren't loaded.
[bhelgaas: changelog, limit to multi-function, limit to IDE/ATA]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=81551
Reported-and-tested-by: Barto <mister.freeman@laposte.net>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v3.15+
Diffstat (limited to 'drivers/pci/pci.c')
0 files changed, 0 insertions, 0 deletions