]> git.karo-electronics.de Git - karo-tx-linux.git/commit
Intel xhci: Only switch the switchable ports
authorKeng-Yu Lin <kengyu@canonical.com>
Thu, 9 Aug 2012 17:39:23 +0000 (01:39 +0800)
committerSarah Sharp <sarah.a.sharp@linux.intel.com>
Tue, 4 Sep 2012 22:10:00 +0000 (15:10 -0700)
commita96874a2a92feaef607ddd3137277a788cb927a6
treebe221e3fd0b198e135ae5c6a25cd1611b40d3e68
parent29d214576f936db627ff62afb9ef438eea18bcd2
Intel xhci: Only switch the switchable ports

With a previous patch to enable the EHCI/XHCI port switching, it switches
all the available ports.

The assumption is not correct because the BIOS may expect some ports
not switchable by the OS.

There are two more registers that contains the information of the switchable
and non-switchable ports.

This patch adds the checking code for the two register so that only the
switchable ports are altered.

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: Keng-Yu Lin <kengyu@canonical.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
drivers/usb/host/pci-quirks.c