Re: [PATCH v4 08/26] media: mc: Do not call cdev_device_del() if cdev_device_add() fails

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On 10/06/2024 12:05, Sakari Ailus wrote:
> cdev_device_del() is the right function to remove a device when
> cdev_device_add() succeeds. If it does not, however, put_device() needs to
> be used instead. Fix this.

Hmm, this too is due to a revert patch (03/26) removing something that needs
to be reinstated.

Wouldn't it be better to fold this into 04/26, with a comment in the commit
log of that commit?

The problem with this commit log is that it suggests that it fixes a bug,
when really it just corrects something introduced by a revert.

Regards,

	Hans

> 
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> Acked-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
> ---
>  drivers/media/mc/mc-devnode.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/mc/mc-devnode.c b/drivers/media/mc/mc-devnode.c
> index 2e33c2007f08..707593d127a7 100644
> --- a/drivers/media/mc/mc-devnode.c
> +++ b/drivers/media/mc/mc-devnode.c
> @@ -252,9 +252,9 @@ int __must_check media_devnode_register(struct media_devnode *devnode,
>  
>  cdev_add_error:
>  	mutex_lock(&media_devnode_lock);
> -	cdev_device_del(&devnode->cdev, &devnode->dev);
>  	clear_bit(devnode->minor, media_devnode_nums);
>  	mutex_unlock(&media_devnode_lock);
> +	put_device(&devnode->dev);
>  
>  	return ret;
>  }





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