usb: retry reset if a device times out
authorOliver Neukum <oneukum@suse.com>
Wed, 10 Feb 2016 10:33:18 +0000 (11:33 +0100)
committerDanny Wood <danwood76@gmail.com>
Tue, 29 Jan 2019 13:12:34 +0000 (13:12 +0000)
commit07fdc15ab5e8c14bc19f82c7d1ec479cbaefcbb1
treeff5e5fabb620ad3adfad960b8044b9e5731bbaa0
parentabd1b236b2bfa49dcc24ab09cc40a63d09b550a7
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>
CC: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
drivers/usb/core/hub.c