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usb: xhci: Check for XHCI_PLAT in xhci_cleanup_msix()

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If CONFIG_PCI is enabled, make sure xhci_cleanup_msix()
doesn't try to free a bogus PCI IRQ or dereference an invalid
pci_dev when the xHCI device is actually a platform_device.

This patch should be backported to kernels as old as 3.9, that
contain the commit 52fb61250a
"xhci-plat: Don't enable legacy PCI interrupts."

Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Jack Pham 2013-11-15 14:53:14 -08:00 committed by Sarah Sharp
parent 599459d823
commit 9005355af2
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/host/xhci.c
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@ -325,6 +325,9 @@ static void xhci_cleanup_msix(struct xhci_hcd *xhci)
struct usb_hcd *hcd = xhci_to_hcd(xhci);
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
if (xhci->quirks & XHCI_PLAT)
return;
xhci_free_irq(xhci);
if (xhci->msix_entries) {