From: Bernie Thompson <bernie@plugable.com>
Date: Mon, 15 Feb 2010 14:45:55 +0000 (-0800)
Subject: Staging: udlfb: pre-allocated urb list helpers
X-Git-Tag: v2.6.34-rc1~10^2~1^2~73
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4a4854dd2049ddc066a162a0f843dc2a78481060;p=pandora-kernel.git

Staging: udlfb: pre-allocated urb list helpers

Add functions to pre-allocate and free usb bulk urbs for core render path.

Udlfb currently allocates a single urb, guarded by a mutex, that is a key
bottleneck. Because udlfb sends so much data, preallocation is most efficient.

Functions will be used by new rendering functions in later patches.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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