This is a note to let you know that I've just added the patch titled
USB: xhci: fix OS want to own HC
to the 2.6.33-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.33.git;a=summary
The filename of the patch is:
usb-xhci-fix-os-want-to-own-hc.patch
and it can be found in the queue-2.6.33 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.33 longterm
tree,
please let <sta...@kernel.org> know about it.
>From 6768458b17f9bf48a4c3a34e49b20344091b5f7e Mon Sep 17 00:00:00 2001
From: JiSheng Zhang <jszha...@gmail.com>
Date: Sat, 16 Jul 2011 11:04:19 +0800
Subject: USB: xhci: fix OS want to own HC
From: JiSheng Zhang <jszha...@gmail.com>
commit 6768458b17f9bf48a4c3a34e49b20344091b5f7e upstream.
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 <jszha...@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sh...@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
drivers/usb/host/pci-quirks.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -412,7 +412,7 @@ static void __devinit quirk_usb_handoff_
/* 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,
Patches currently in longterm-queue-2.6.33 which might be from
jszha...@gmail.com are
/home/gregkh/linux/longterm/longterm-queue-2.6.33/queue-2.6.33/usb-xhci-fix-os-want-to-own-hc.patch
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