diff options
author | Matthew Garrett <mjg@redhat.com> | 2012-03-27 10:17:41 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-31 15:49:56 -0400 |
commit | c9651e70ad0aa499814817cbf3cc1d0b806ed3a1 (patch) | |
tree | 6347cadf5e3d2835bf63dc52a8fdfe2daaea5161 /drivers/spi/spi-dw.c | |
parent | cdb0f9a1ad2ee3c11e21bc99f0c2021a02844666 (diff) |
ASPM: Fix pcie devices with non-pcie children
Since 3.2.12 and 3.3, some systems are failing to boot with a BUG_ON.
Some other systems using the pata_jmicron driver fail to boot because no
disks are detected. Passing pcie_aspm=force on the kernel command line
works around it.
The cause: commit 4949be16822e ("PCI: ignore pre-1.1 ASPM quirking when
ASPM is disabled") changed the behaviour of pcie_aspm_sanity_check() to
always return 0 if aspm is disabled, in order to avoid cases where we
changed ASPM state on pre-PCIe 1.1 devices.
This skipped the secondary function of pcie_aspm_sanity_check which was
to avoid us enabling ASPM on devices that had non-PCIe children, causing
trouble later on. Move the aspm_disabled check so we continue to honour
that scenario.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=42979 and
http://bugs.debian.org/665420
Reported-by: Romain Francoise <romain@orebokech.com> # kernel panic
Reported-by: Chris Holland <bandidoirlandes@gmail.com> # disk detection trouble
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: stable@vger.kernel.org
Tested-by: Hatem Masmoudi <hatem.masmoudi@gmail.com> # Dell Latitude E5520
Tested-by: janek <jan0x6c@gmail.com> # pata_jmicron with JMB362/JMB363
[jn: with more symptoms in log message]
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/spi/spi-dw.c')
0 files changed, 0 insertions, 0 deletions