Commit 0770d07f authored by Jonathan Corbet's avatar Jonathan Corbet Committed by Mauro Carvalho Chehab

[media] marvell-cam: Remove broken "owner" logic

The marvell cam driver retained just enough of the owner-tracking logic
from cafe_ccic to be broken; it could, conceivably, cause the driver to
release DMA memory while the controller is still active.  Simply remove the
remaining pieces and ensure that the controller is stopped before we free
things.
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 49df19eb
......@@ -1564,11 +1564,8 @@ static int mcam_v4l_release(struct file *filp)
singles, delivered);
mutex_lock(&cam->s_mutex);
(cam->users)--;
if (filp == cam->owner) {
mcam_ctlr_stop_dma(cam);
cam->owner = NULL;
}
if (cam->users == 0) {
mcam_ctlr_stop_dma(cam);
mcam_cleanup_vb2(cam);
mcam_ctlr_power_down(cam);
if (cam->buffer_mode == B_vmalloc && alloc_bufs_at_read)
......
......@@ -107,7 +107,6 @@ struct mcam_camera {
enum mcam_state state;
unsigned long flags; /* Buffer status, mainly (dev_lock) */
int users; /* How many open FDs */
struct file *owner; /* Who has data access (v4l2) */
/*
* Subsystem structures.
......
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