This is a note to let you know that I've just added the patch titled
xhci: Recognize USB 3.0 devices as superspeed at powerup
to the 3.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xhci-recognize-usb-3.0-devices-as-superspeed-at-powerup.patch
and it can be found in the queue-3.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 29d214576f936db627ff62afb9ef438eea18bcd2 Mon Sep 17 00:00:00 2001
From: Manoj Iyer <[email protected]>
Date: Wed, 22 Aug 2012 11:53:18 -0500
Subject: xhci: Recognize USB 3.0 devices as superspeed at powerup
From: Manoj Iyer <[email protected]>
commit 29d214576f936db627ff62afb9ef438eea18bcd2 upstream.
On Intel Panther Point chipset USB 3.0 devices show up as
high-speed devices on powerup, but after an s3 cycle they are
correctly recognized as SuperSpeed. At powerup switch the port
to xHCI so that USB 3.0 devices are correctly recognized.
BugLink: http://bugs.launchpad.net/bugs/1000424
This patch should be backported to kernels as old as 3.0, that contain
commit ID 69e848c2090aebba5698a1620604c7dccb448684 "Intel xhci: Support
EHCI/xHCI port switching."
Signed-off-by: Manoj Iyer <[email protected]>
Signed-off-by: Sarah Sharp <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/host/pci-quirks.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -897,9 +897,10 @@ static void __devinit quirk_usb_handoff_
/* Disable any BIOS SMIs and clear all SMI events*/
writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
+hc_init:
if (usb_is_intel_switchable_xhci(pdev))
usb_enable_xhci_ports(pdev);
-hc_init:
+
op_reg_base = base + XHCI_HC_LENGTH(readl(base));
/* Wait for the host controller to be ready before writing any
Patches currently in stable-queue which might be from [email protected]
are
queue-3.5/xhci-recognize-usb-3.0-devices-as-superspeed-at-powerup.patch
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