V4L/DVB (9646): em28xx: avoid allocating/dealocating memory on every control urb
authorMauro Carvalho Chehab <mchehab@redhat.com>
Tue, 18 Nov 2008 17:51:08 +0000 (14:51 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Thu, 20 Nov 2008 19:19:31 +0000 (17:19 -0200)
commitc4a98793a63c423c9e1af51822325969e23c16d4
tree9711b371b6eb6ba1ffa9a8201f3528308526cd00
parent625ff1679456d8adb9af0c980394ea3954e727a8
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>
drivers/media/video/em28xx/em28xx-core.c
drivers/media/video/em28xx/em28xx.h