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

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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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This commit is contained in:

Mauro Carvalho Chehab 2008-11-18 14:51:08 -03:00

parent 625ff16794

commit c4a98793a6

2 changed files with 31 additions and 22 deletions

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48

drivers/media/video/em28xx/em28xx-core.c

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5

drivers/media/video/em28xx/em28xx.h

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