From: Roger Quadros <rogerq@ti.com>
Date: Wed, 26 Mar 2014 16:46:38 +0000 (+0200)
Subject: usb: gadget: zero: Fix SuperSpeed enumeration for alternate setting 1
X-Git-Tag: omap-for-v3.16/pm-signed~48^2~20^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9c1b70361e0b38e4acb8e62b54da66538cb77ff2;p=pandora-kernel.git

usb: gadget: zero: Fix SuperSpeed enumeration for alternate setting 1

It was impossible to enumerate on a SuperSpeed (XHCI) host
with alternate setting = 1 due to the wrongly set 'bMaxBurst'
field in the SuperSpeed Endpoint Companion descriptor.

Testcase:
<host> modprobe -r usbtest; modprobe usbtest alt=1
<device> modprobe g_zero
plug device to SuperSpeed port on the host.

Without this patch the host always complains like so
"usb 12-2: Not enough bandwidth for new device state.
 usb 12-2: Not enough bandwidth for altsetting 1"

Bug was introduced by commit cf9a08ae in v3.9

Fixes: cf9a08ae5aec (usb: gadget: convert source sink and loopback to
new function interface)

Cc: 3.9+ <stable@vger.kernel.org> # 3.9+
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

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