]> git.karo-electronics.de Git - linux-beck.git/commit
USB: quirks: enable device-qualifier quirk for Elan Touchscreen
authorJohan Hovold <johan@kernel.org>
Mon, 25 Aug 2014 15:51:27 +0000 (17:51 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 24 Sep 2014 04:15:39 +0000 (21:15 -0700)
commitc68929f75dfcb6354918862b91b5778585de1fa5
treed3d3261149ee319ff280900e88f7d4c3723e4266
parent2a159389bf5d962359349a76827b2f683276a1c7
USB: quirks: enable device-qualifier quirk for Elan Touchscreen

Enable device-qualifier quirk for Elan Touchscreen, which often fails to
handle requests for the device_descriptor.

Note that the device sometimes do respond properly with a Request Error
(three times as USB core retries), but usually fails to respond at all.
When this happens any further descriptor requests also fails, for
example:

[ 1528.688934] usb 2-7: new full-speed USB device number 4 using xhci_hcd
[ 1530.945588] usb 2-7: unable to read config index 0 descriptor/start: -71
[ 1530.945592] usb 2-7: can't read configurations, error -71

This has been observed repeating for over a minute before eventual
successful enumeration.

Reported-by: Drew Von Spreecken <drewvs@gmail.com>
Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/core/quirks.c