usb: xhci: Check for XHCI_PLAT in xhci_cleanup_msix()
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 52fb61250a7a132b0cfb9f4a1060a1f3c49e5a25
"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
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 6bc966c..f8ffc51 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -325,6 +325,9 @@
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) {