[media] bttv: remove unneeded locking comments

After Mauro's "bttv: Fix locking issues due to BKL removal code" there
are a number of comments that are no longer needed about lock ordering.
Remove them.

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

diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index c14b819d6b785b908734c4638a22ef8546996ff1..e071b62f36aa0c7b61f6857e783189784cf2681b 100644 (file)
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -2359,13 +2359,6 @@ static int setup_window_lock(struct bttv_fh *fh, struct bttv *btv,
        fh->ov.field    = win->field;
        fh->ov.setup_ok = 1;
 
-       /*
-        * FIXME: btv is protected by btv->lock mutex, while btv->init
-        *        is protected by fh->cap.vb_lock. This seems to open the
-        *        possibility for some race situations. Maybe the better would
-        *        be to unify those locks or to use another way to store the
-        *        init values that will be consumed by videobuf callbacks
-        */
        btv->init.ov.w.width   = win->w.width;
        btv->init.ov.w.height  = win->w.height;
        btv->init.ov.field     = win->field;
@@ -3220,15 +3213,6 @@ static int bttv_open(struct file *file)
                return -ENOMEM;
        file->private_data = fh;
 
-       /*
-        * btv is protected by btv->lock mutex, while btv->init and other
-        * streaming vars are protected by fh->cap.vb_lock. We need to take
-        * care of both locks to avoid troubles. However, vb_lock is used also
-        * inside videobuf, without calling buf->lock. So, it is a very bad
-        * idea to hold both locks at the same time.
-        * Let's first copy btv->init at fh, holding cap.vb_lock, and then work
-        * with the rest of init, holding btv->lock.
-        */
        *fh = btv->init;
 
        fh->type = type;
@@ -3303,10 +3287,6 @@ static int bttv_release(struct file *file)
 
        /* free stuff */
 
-       /*
-        * videobuf uses cap.vb_lock - we should avoid holding btv->lock,
-        * otherwise we may have dead lock conditions
-        */
        videobuf_mmap_free(&fh->cap);
        videobuf_mmap_free(&fh->vbi);
        v4l2_prio_close(&btv->prio, fh->prio);