From: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Tue, 18 Nov 2008 17:51:08 +0000 (-0300)
Subject: V4L/DVB (9646): em28xx: avoid allocating/dealocating memory on every control urb
X-Git-Tag: v2.6.28-rc7~1^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c4a98793a63c423c9e1af51822325969e23c16d4;p=pandora-kernel.git

V4L/DVB (9646): em28xx: avoid allocating/dealocating memory on every control urb

Before this patch, every register setup on em28xx were dynamically
allocating a temporary buffer for control URB's to be handled.

To avoid this ping-pong, use, instead a pre-allocated buffer.

Also, be sure that read control URB's also use the buffer, instead of
relying on a stack buffer.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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