3.11.10.4 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Jack Pham <jackp@xxxxxxxxxxxxxx>
commit 9005355af23856c55a5538c9024355785424821b upstream.
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@xxxxxxxxxxxxxx>
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
drivers/usb/host/xhci.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 2047fb4..920e14b 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -316,6 +316,9 @@ 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) {
--
1.8.3.2
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