| Message ID | 20220421234240.1694-3-laurent.pinchart@ideasonboard.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: rkisp1: Misc bug fixes and cleanups | expand |
Laurent Pinchart wrote: > 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. > > While at it, drop the double initialization of cap->rkisp1 in > rkisp1_capture_devs_register() as the field is already initialized in > rkisp1_capture_init(). > > Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Ricardo Ribalda <ribalda@chromium.org> > --- > Changes since v2: > > - Use video_is_registered() as registration test > - Drop double initialization of cap->rkisp1 > - Move part of 03/17 to this patch > > Changes since v1: > > - Reset cap->rkisp1 in rkisp1_capture_devs_register() > --- > .../platform/rockchip/rkisp1/rkisp1-capture.c | 30 +++++++++---------- > 1 file changed, 15 insertions(+), 15 deletions(-) > > diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c > index e88749488969..6c54e95a529b 100644 > --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c > +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c > @@ -1326,8 +1326,12 @@ static const struct v4l2_file_operations rkisp1_fops = { > > static void rkisp1_unregister_capture(struct rkisp1_capture *cap) > { > + if (!video_is_registered(&cap->vnode.vdev)) > + 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) > @@ -1381,14 +1385,14 @@ static int rkisp1_register_capture(struct rkisp1_capture *cap) > if (ret) { > dev_err(cap->rkisp1->dev, > "vb2 queue init failed (err=%d)\n", ret); > - return ret; > + goto error; > } > > vdev->queue = q; > > ret = media_entity_pads_init(&vdev->entity, 1, &node->pad); > if (ret) > - return ret; > + goto error; > > ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); > if (ret) { > @@ -1404,6 +1408,7 @@ static int rkisp1_register_capture(struct rkisp1_capture *cap) > > error: > media_entity_cleanup(&vdev->entity); > + mutex_destroy(&node->vlock); > return ret; > } > > @@ -1439,26 +1444,21 @@ 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 > >
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c index e88749488969..6c54e95a529b 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c @@ -1326,8 +1326,12 @@ static const struct v4l2_file_operations rkisp1_fops = { static void rkisp1_unregister_capture(struct rkisp1_capture *cap) { + if (!video_is_registered(&cap->vnode.vdev)) + 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) @@ -1381,14 +1385,14 @@ static int rkisp1_register_capture(struct rkisp1_capture *cap) if (ret) { dev_err(cap->rkisp1->dev, "vb2 queue init failed (err=%d)\n", ret); - return ret; + goto error; } vdev->queue = q; ret = media_entity_pads_init(&vdev->entity, 1, &node->pad); if (ret) - return ret; + goto error; ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); if (ret) { @@ -1404,6 +1408,7 @@ static int rkisp1_register_capture(struct rkisp1_capture *cap) error: media_entity_cleanup(&vdev->entity); + mutex_destroy(&node->vlock); return ret; } @@ -1439,26 +1444,21 @@ 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; }
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. While at it, drop the double initialization of cap->rkisp1 in rkisp1_capture_devs_register() as the field is already initialized in rkisp1_capture_init(). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> --- Changes since v2: - Use video_is_registered() as registration test - Drop double initialization of cap->rkisp1 - Move part of 03/17 to this patch Changes since v1: - Reset cap->rkisp1 in rkisp1_capture_devs_register() --- .../platform/rockchip/rkisp1/rkisp1-capture.c | 30 +++++++++---------- 1 file changed, 15 insertions(+), 15 deletions(-)