Merge branch 'rbd-sysfs' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...

[pandora-kernel.git] / drivers / usb / host / ehci-pci.c

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index a1e8d27..01bb72b 100644 (file)
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -103,6 +103,19 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
        if (retval)
                return retval;
 
+       if ((pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x7808) ||
+           (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x4396)) {
+               /* EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may
+                * read/write memory space which does not belong to it when
+                * there is NULL pointer with T-bit set to 1 in the frame list
+                * table. To avoid the issue, the frame list link pointer
+                * should always contain a valid pointer to a inactive qh.
+                */
+               ehci->use_dummy_qh = 1;
+               ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI "
+                               "dummy qh workaround\n");
+       }
+
        /* data structure init */
        retval = ehci_init(hcd);
        if (retval)