From: Mathias Nyman <mathias.nyman@linux.intel.com>
Date: Tue, 24 Feb 2015 16:27:02 +0000 (+0200)
Subject: xhci: Clear the host side toggle manually when endpoint is 'soft reset'
X-Git-Tag: omap-for-v4.1/wl12xx-dt~45^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27082e2654dc148078b0abdfc3c8e5ccbde0ebfa;p=pandora-kernel.git

xhci: Clear the host side toggle manually when endpoint is 'soft reset'

Main benefit of this is to get xhci connected USB scanners to work.

Some devices use a clear endpoint halt request as a 'soft reset' even if
the endpoint is not halted. This will clear the toggle and sequence on the
device side. xHCI however refuses to reset a non-halted endpoint, so instead
we need to issue a configure endpoint command on xHCI to clear its host side
toggle and sequence, and get it in sync with the device side.

Tested-by: Mike Mammarella <mikem@crystalorb.net>
Cc: <stable@vger.kernel.org> # v3.18
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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