From: JiSheng Zhang <jszhang3@xxxxxxxxx>
Software should set XHCI_HC_OS_OWNED bit to request ownership of xHC.
This patch should be backported to kernels as far back as 2.6.31.
Signed-off-by: JiSheng Zhang <jszhang3@xxxxxxxxx>
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxx
---
drivers/usb/host/pci-quirks.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index a9d3159..f4d1b69 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -817,7 +817,7 @@ static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev)
/* If the BIOS owns the HC, signal that the OS wants it, and wait */
if (val & XHCI_HC_BIOS_OWNED) {
- writel(val & XHCI_HC_OS_OWNED, base + ext_cap_offset);
+ writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset);
/* Wait for 5 seconds with 10 microsecond polling interval */
timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED,
--
1.7.4.1
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