USB: xhci: fix OS want to own HC
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@gmail.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
This commit is contained in:
parent
7bd89b4017
commit
6768458b17
|
@ -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,
|
||||
|
|
Loading…
Reference in a new issue