linux-kernel - [PATCH] USB: xhci: fix OS want to own HC

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Message-ID: <20110716110419.726be2b0@ustc>
Date:	Sat, 16 Jul 2011 11:04:19 +0800
From:	JiSheng Zhang <jszhang3@...il.com>
To:	linux-kernel@...r.kernel.org, sarah.a.sharp@...ux.intel.com
Subject: [PATCH] USB: xhci: fix OS want to own HC

Software should set XHCI_HC_OS_OWNED bit to request ownership of xHC

Signed-off-by: JiSheng Zhang <jszhang3@...il.com>
---
 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 fd93061..1a73004 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -775,7 +775,7 @@ 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,
-- 
1.7.5.4

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