usb: retry reset if a device times out
authorOliver Neukum <oneukum@suse.com>
Wed, 10 Feb 2016 10:33:18 +0000 (11:33 +0100)
committerBen Hutchings <ben@decadent.org.uk>
Sat, 30 Apr 2016 22:05:14 +0000 (00:05 +0200)
commit325d8837beeb60ab8dd53f6df56860654fa8cdd7
tree2db065b56fdc567b81e963613a9342a6f3ae30a6
parent23397e31d3c8243b07b3b4cca6663a5672ffadfa
usb: retry reset if a device times out

commit 264904ccc33c604d4b3141bbd33808152dfac45b upstream.

Some devices I got show an inability to operate right after
power on if they are already connected. They are beyond recovery
if the descriptors are requested multiple times. So in case of
a timeout we rather bail early and reset again. But it must be
done only on the first loop lest we get into a reset/time out
spiral that can be overcome with a retry.

This patch is a rework of a patch that fell through the cracks.
http://www.spinics.net/lists/linux-usb/msg103263.html

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
drivers/usb/core/hub.c