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authorJulia Lawall <julia@diku.dk>2008-01-11 22:03:42 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-01-25 19:05:02 -0200
commita2a9b1eceb50993ef9e126dffc2f678fd6602158 (patch)
treeb1303c735608c5ebbe3eea800d6b2cd2ff080a9a
parentbc835d80d9cd912cfa8beb6ad4549cd8160d3601 (diff)
V4L/DVB (7035): drivers/media/common: Add missing video_device_release
Video_device_alloc returns the result of a kzalloc. In this case, the value is stored in a local variable which is not copied elsewhere before the point of the error return (video_register_device does not save its first argument anywhere if it returns a negative value). Thus, a video_device_release it needed before the error return. The problem was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T,T1,T2; identifier E; statement S; expression x1,x2,x3; int ret; @@ T E; ... * E = video_device_alloc(...); if (E == NULL) S ... when != video_device_release(...,(T1)E,...) when != if (E != NULL) { ... video_device_release(...,(T1)E,...); ...} when != x1 = (T1)E when != E = x3; when any if (...) { ... when != video_device_release(...,(T2)E,...) when != if (E != NULL) { ... video_device_release(...,(T2)E,...); ...} when != x2 = (T2)E ( * return; | * return ret; ) } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> CC: Oliver Endriss <o.endriss@gmx.de> CC: Michael Hunold <michael@mihu.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
-rw-r--r--drivers/media/common/saa7146_fops.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/common/saa7146_fops.c b/drivers/media/common/saa7146_fops.c
index b40bf23..f0703d8 100644
--- a/drivers/media/common/saa7146_fops.c
+++ b/drivers/media/common/saa7146_fops.c
@@ -538,6 +538,7 @@ int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
// fixme: -1 should be an insmod parameter *for the extension* (like "video_nr");
if (video_register_device(vfd, type, -1) < 0) {
ERR(("cannot register v4l2 device. skipping.\n"));
+ video_device_release(vfd);
return -1;
}