Hi Lubomir,
Thanks for the patch.
On Tue, Dec 31, 2024 at 08:04:34PM +0100, Lubomir Rintel wrote:
> In commit 4af65141e38e ("media: marvell: cafe: Register V4L2 device
> earlier"), a call to v4l2_device_register() was moved away from
> mccic_register() into its caller, marvell/cafe's cafe_pci_probe().
> This is not the only caller though -- there's also marvell/mmp.
>
> Add v4l2_device_register() into mmpcam_probe() to unbreak the MMP camera
> driver, in a fashion analogous to what's been done to the Cafe driver.
> Same for the teardown path.
>
> Fixes: 4af65141e38e ("media: marvell: cafe: Register V4L2 device earlier")
> Signed-off-by: Lubomir Rintel <lkundrak@xxxxx>
> Cc: stable@xxxxxxxxxxxxxxx # v6.6+
> ---
> drivers/media/platform/marvell/mmp-driver.c | 21 +++++++++++++++++----
> 1 file changed, 17 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/platform/marvell/mmp-driver.c b/drivers/media/platform/marvell/mmp-driver.c
> index 3fd4fc1b9c48..d3da7ebb4a2b 100644
> --- a/drivers/media/platform/marvell/mmp-driver.c
> +++ b/drivers/media/platform/marvell/mmp-driver.c
> @@ -231,13 +231,23 @@ static int mmpcam_probe(struct platform_device *pdev)
>
> mcam_init_clk(mcam);
>
> + /*
> + * Register with V4L.
> + */
> +
> + ret = v4l2_device_register(mcam->dev, &mcam->v4l2_dev);
I'd do this just before initialising the notifier (as in the patch in
Fixes: tag): registering the V4L2 device requires probably severe memory
pressure while it's entirely plausible there's no endpoint for the device.
> + if (ret)
> + return ret;
> +
> /*
> * Create a match of the sensor against its OF node.
> */
> ep = fwnode_graph_get_next_endpoint(of_fwnode_handle(pdev->dev.of_node),
> NULL);
> - if (!ep)
> - return -ENODEV;
> + if (!ep) {
> + ret = -ENODEV;
> + goto out_v4l2_device_unregister;
> + }
>
> v4l2_async_nf_init(&mcam->notifier, &mcam->v4l2_dev);
>
> @@ -246,7 +256,7 @@ static int mmpcam_probe(struct platform_device *pdev)
> fwnode_handle_put(ep);
> if (IS_ERR(asd)) {
> ret = PTR_ERR(asd);
> - goto out;
> + goto out_v4l2_device_unregister;
> }
>
> /*
> @@ -254,7 +264,7 @@ static int mmpcam_probe(struct platform_device *pdev)
> */
> ret = mccic_register(mcam);
> if (ret)
> - goto out;
> + goto out_v4l2_device_unregister;
>
> /*
> * Add OF clock provider.
> @@ -283,6 +293,8 @@ static int mmpcam_probe(struct platform_device *pdev)
> return 0;
> out:
For clarity, it'd be best to rename the out label to something more
specific, i.e. out_mccic_shutdown. Either way,
Reviewed-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> mccic_shutdown(mcam);
> +out_v4l2_device_unregister:
> + v4l2_device_unregister(&mcam->v4l2_dev);
>
> return ret;
> }
> @@ -293,6 +305,7 @@ static void mmpcam_remove(struct platform_device *pdev)
> struct mcam_camera *mcam = &cam->mcam;
>
> mccic_shutdown(mcam);
> + v4l2_device_unregister(&mcam->v4l2_dev);
> pm_runtime_force_suspend(mcam->dev);
> }
>
--
Regards,
Sakari Ailus
