The above patch queued for 3.13 in for-linus branch from Bjorn Helgaas
https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=for-linus&id=4fc9bbf98fd66f879e628d8537ba7c240be2b58e
@Tarpoon: is not upstream yet, but you can git cherry-pick, or manual
apply, etc.
[quote]
PCI: Disable Bus Master only on kexec reboot
Add a flag to tell the PCI subsystem that kernel is shutting down in
preparation to kexec a kernel. Add code in PCI subsystem to use this flag
to clear Bus Master bit on PCI devices only in case of kexec reboot.
This fixes a power-off problem on Acer Aspire V5-573G and likely other
machines and avoids any other issues caused by clearing Bus Master bit on
PCI devices in normal shutdown path. The problem was introduced by
b566a22c2332 ("PCI: disable Bus Master on PCI device shutdown").
This patch is based on discussion at
http://marc.info/?l=linux-pci&m=138425645204355&w=2
Link: https://bugzilla.kernel.org/show_bug.cgi?id=63861
Reported-by: Chang Liu <[email protected]>
Signed-off-by: Khalid Aziz <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Konstantin Khlebnikov <[email protected]>
Cc: [email protected] # v3.5+
[/quote]
** Bug watch added: Linux Kernel Bug Tracker #63861
http://bugzilla.kernel.org/show_bug.cgi?id=63861
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https://bugs.launchpad.net/bugs/1257338
Title:
[Acer Aspire E1-572] Freezes at shutdown screen when attempting to
shutdown
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