From: Johan Hovold <johan@kernel.org>
Date: Mon, 25 Aug 2014 15:51:27 +0000 (+0200)
Subject: USB: quirks: enable device-qualifier quirk for Elan Touchscreen
X-Git-Tag: fixes-for-v3.18-merge-window~16^2~105
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c68929f75dfcb6354918862b91b5778585de1fa5;p=pandora-kernel.git

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>
---

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