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| author | Alan Stern <stern@rowland.harvard.edu> | 2012-04-24 14:07:22 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-24 13:55:43 -0700 |
| commit | 151b61284776be2d6f02d48c23c3625678960b97 (patch) | |
| tree | db1924a65d3f4416122ab4bb0600f750a6f9dd00 /include | |
| parent | 6f6543f53f9ce136e01d7114bf6f0818ca54fb41 (diff) | |
| download | linux-151b61284776be2d6f02d48c23c3625678960b97.tar.gz linux-151b61284776be2d6f02d48c23c3625678960b97.tar.bz2 linux-151b61284776be2d6f02d48c23c3625678960b97.zip | |
USB: EHCI: fix crash during suspend on ASUS computers
This patch (as1545) fixes a problem affecting several ASUS computers:
The machine crashes or corrupts memory when going into suspend if the
ehci-hcd driver is bound to any controllers. Users have been forced
to unbind or unload ehci-hcd before putting their systems to sleep.
After extensive testing, it was determined that the machines don't
like going into suspend when any EHCI controllers are in the PCI D3
power state. Presumably this is a firmware bug, but there's nothing
we can do about it except to avoid putting the controllers in D3
during system sleep.
The patch adds a new flag to indicate whether the problem is present,
and avoids changing the controller's power state if the flag is set.
Runtime suspend is unaffected; this matters only for system suspend.
However as a side effect, the controller will not respond to remote
wakeup requests while the system is asleep. Hence USB wakeup is not
functional -- but of course, this is already true in the current state
of affairs.
This fixes Bugzilla #42728.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Andrey Rahmatullin <wrar@wrar.name>
Tested-by: Oleksij Rempel (fishor) <bug-track@fisher-privat.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb/hcd.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 5de415707c23..d28cc78a38e4 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -126,6 +126,8 @@ struct usb_hcd { unsigned wireless:1; /* Wireless USB HCD */ unsigned authorized_default:1; unsigned has_tt:1; /* Integrated TT in root hub */ + unsigned broken_pci_sleep:1; /* Don't put the + controller in PCI-D3 for system sleep */ unsigned int irq; /* irq allocated */ void __iomem *regs; /* device memory/io */ |