tree b16d64b16d3f19f4675bc9787719795d1601d96c
parent 02cc097e62d51bf6e5cb4209ca90d9bf68e358b5
author Peter Wu <peter@lekensteyn.nl> 1418302278 +0100
committer Jiri Kosina <jkosina@suse.cz> 1418335800 +0100

HID: logitech-hidpp: check name retrieval return code

hidpp_devicenametype_get_device_name() may return a negative value on
protocol errors (for example, when the device is powered off).
Explicitly check this condition to avoid a long-running loop.

(0 cannot be returned as __name_length - index > 0, but check for it
anyway as it would otherwise result in an infinite loop.)

Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>