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Message-Id: <20140204210223.284309779@linuxfoundation.org>
Date: Tue, 4 Feb 2014 13:01:22 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Jack Pham <jackp@...eaurora.org>,
Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Subject: [PATCH 3.10 019/104] usb: xhci: Check for XHCI_PLAT in xhci_cleanup_msix()
3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jack Pham <jackp@...eaurora.org>
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@...eaurora.org>
Signed-off-by: Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/usb/host/xhci.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -315,6 +315,9 @@ static void xhci_cleanup_msix(struct xhc
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) {
--
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