[PATCH 02/16] media: rkisp1: capture: Fix and simplify (un)registration
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Sun Feb 27 08:01:02 PST 2022
The rkisp1_register_capture() and rkisp1_unregister_capture() functions
don't destroy the mutex (in the error path for the former). Fix this and
make rkisp1_unregister_capture() and rkisp1_capture_devs_unregister()
safe to be called on an unregistered capture node to prepare for
simplification of error handling at probe time.
Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
.../platform/rockchip/rkisp1/rkisp1-capture.c | 26 ++++++++++---------
1 file changed, 14 insertions(+), 12 deletions(-)
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
index 9c11f2b8e5f5..18be7c982db7 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
@@ -1312,8 +1312,12 @@ static const struct v4l2_file_operations rkisp1_fops = {
static void rkisp1_unregister_capture(struct rkisp1_capture *cap)
{
+ if (!cap->rkisp1)
+ return;
+
media_entity_cleanup(&cap->vnode.vdev.entity);
vb2_video_unregister_device(&cap->vnode.vdev);
+ mutex_destroy(&cap->vnode.vlock);
}
void rkisp1_capture_devs_unregister(struct rkisp1_device *rkisp1)
@@ -1390,6 +1394,8 @@ static int rkisp1_register_capture(struct rkisp1_capture *cap)
error:
media_entity_cleanup(&vdev->entity);
+ mutex_destroy(&node->vlock);
+ cap->rkisp1 = NULL;
return ret;
}
@@ -1425,26 +1431,22 @@ rkisp1_capture_init(struct rkisp1_device *rkisp1, enum rkisp1_stream_id id)
int rkisp1_capture_devs_register(struct rkisp1_device *rkisp1)
{
- struct rkisp1_capture *cap;
- unsigned int i, j;
+ unsigned int i;
int ret;
for (i = 0; i < ARRAY_SIZE(rkisp1->capture_devs); i++) {
+ struct rkisp1_capture *cap = &rkisp1->capture_devs[i];
+
rkisp1_capture_init(rkisp1, i);
- cap = &rkisp1->capture_devs[i];
cap->rkisp1 = rkisp1;
+
ret = rkisp1_register_capture(cap);
- if (ret)
- goto err_unreg_capture_devs;
+ if (ret) {
+ rkisp1_capture_devs_unregister(rkisp1);
+ return ret;
+ }
}
return 0;
-err_unreg_capture_devs:
- for (j = 0; j < i; j++) {
- cap = &rkisp1->capture_devs[j];
- rkisp1_unregister_capture(cap);
- }
-
- return ret;
}
--
Regards,
Laurent Pinchart
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