tree 1f6079f64f6196e50cd9ed993fe1e3a2c8eb4331
parent c726b65d079cafabc558616badbeead442e2b114
author Brandon Philips <bphilips@suse.de> 1191612387 -0300
committer Mauro Carvalho Chehab <mchehab@infradead.org> 1191985400 -0300

V4L/DVB (6305): V4L: videobuf-core.c avoid NULL dereferences in videobuf-core

The return value of videobuf_alloc() is unchecked but this function will
return NULL on an error.  Check for NULL and make videobuf_reqbufs()
return the number of successfully allocated buffers.

Also, fix saa7146_video.c and bttv-driver.c to use this returned
buffer count.

Tested against the vivi driver.  Not tested against saa7146 or bt8xx
devices.

Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>