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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2011-05-30 15:45:47 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-06-01 13:24:23 -0300
commit8c89ddd536bbe97c1e50424778a139abbf5763c3 (patch)
tree18281c7cae3e5de64e8745f2d05ad0c03815d34e /drivers/media/media-devnode.c
parent67e27c741339faedcc8e9c2c613487745d1c4b8b (diff)
[media] media: Fix media device minor registration
The find_next_zero_bit() is called with the from and to arguments in the wrong order. This results in the function always returning 0, and all media devices being registered with minor 0. Furthermore, mdev->minor is then used before being assigned with the find_next_zero_bit() return value. This really makes sure we'll always use minor 0. Fix this and let the system support more than one media device. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: stable@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/media-devnode.c')
-rw-r--r--drivers/media/media-devnode.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/media-devnode.c b/drivers/media/media-devnode.c
index af5263c6625..7b42ace419d 100644
--- a/drivers/media/media-devnode.c
+++ b/drivers/media/media-devnode.c
@@ -213,14 +213,14 @@ int __must_check media_devnode_register(struct media_devnode *mdev)
/* Part 1: Find a free minor number */
mutex_lock(&media_devnode_lock);
- minor = find_next_zero_bit(media_devnode_nums, 0, MEDIA_NUM_DEVICES);
+ minor = find_next_zero_bit(media_devnode_nums, MEDIA_NUM_DEVICES, 0);
if (minor == MEDIA_NUM_DEVICES) {
mutex_unlock(&media_devnode_lock);
printk(KERN_ERR "could not get a free minor\n");
return -ENFILE;
}
- set_bit(mdev->minor, media_devnode_nums);
+ set_bit(minor, media_devnode_nums);
mutex_unlock(&media_devnode_lock);
mdev->minor = minor;