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xHCI: synchronize irq in xhci_suspend()

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Synchronize the interrupts instead of free them in xhci_suspend(). This will
prevent a double free when the host is suspended and then the card removed.

Set the flag hcd->msix_enabled when using MSI-X, and check the flag in
suspend_common(). MSI-X synchronization will be handled by xhci_suspend(),
and MSI/INTx will be synchronized in suspend_common().

This patch should be queued for the 2.6.37 stable tree.

Reported-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@kernel.org
This commit is contained in:
Andiry Xu 2010-12-27 17:39:02 +08:00 • committed by Sarah Sharp
parent 7111ebc97e
commit 0029227f1b
3 changed files with 22 additions and 32 deletions
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1
include/linux/usb/hcd.h
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@ -112,6 +112,7 @@ struct usb_hcd {
/* Flags that get set only during HCD registration or removal. */
unsigned rh_registered:1;/* is root hub registered? */
unsigned rh_pollable:1; /* may we poll the root hub? */
unsigned msix_enabled:1; /* driver has MSI-X enabled? */
/* The next flag is a stopgap, to be removed when all the HCDs
* support the new root-hub polling mechanism. */