linux-kernel - Re: [PATCH] media: au0828 analog_register error path fixes to do proper cleanup

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Date:	Wed, 28 Jan 2015 16:54:04 -0700
From:	Shuah Khan <shuahkh@....samsung.com>
To:	mchehab@....samsung.com, hans.verkuil@...co.com,
	sakari.ailus@...ux.intel.com, prabhakar.csengg@...il.com,
	laurent.pinchart@...asonboard.com
CC:	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: au0828 analog_register error path fixes to do
 proper cleanup

On 12/30/2014 05:22 PM, Shuah Khan wrote:
> au0828_analog_register() doesn't release video and vbi queues
> created by vb2_queue_init(). In addition, it doesn't unregister
> vdev when vbi register fails. Add vb2_queue_release() calls to
> release video and vbi queues to the failure path to be called
> when vdev register fails. Add video_unregister_device() for
> vdev when vbi register fails.
> 
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> ---
> Please note that this patch is dependent on the au0828 vb2
> conversion patch.

I have to fold this patch into the vb2 conversion patch as
it no longer applies after the recent changes to address
comments on patch v3. I will fold it into vb2 convert patch v6.
It makes sense since vb2_queue_release() should be part of the
conversion work anyway.

thanks,
-- Shuah
> 
>  drivers/media/usb/au0828/au0828-video.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/usb/au0828/au0828-video.c b/drivers/media/usb/au0828/au0828-video.c
> index 94b65b8..17450eb 100644
> --- a/drivers/media/usb/au0828/au0828-video.c
> +++ b/drivers/media/usb/au0828/au0828-video.c
> @@ -1785,7 +1785,7 @@ int au0828_analog_register(struct au0828_dev *dev,
>  		dprintk(1, "unable to register video device (error = %d).\n",
>  			retval);
>  		ret = -ENODEV;
> -		goto err_vbi_dev;
> +		goto err_reg_vdev;
>  	}
>  
>  	/* Register the vbi device */
> @@ -1795,14 +1795,18 @@ int au0828_analog_register(struct au0828_dev *dev,
>  		dprintk(1, "unable to register vbi device (error = %d).\n",
>  			retval);
>  		ret = -ENODEV;
> -		goto err_vbi_dev;
> +		goto err_reg_vbi_dev;
>  	}
>  
> -
>  	dprintk(1, "%s completed!\n", __func__);
>  
>  	return 0;
>  
> +err_reg_vbi_dev:
> +	video_unregister_device(dev->vdev);
> +err_reg_vdev:
> +	vb2_queue_release(&dev->vb_vidq);
> +	vb2_queue_release(&dev->vb_vbiq);
>  err_vbi_dev:
>  	video_device_release(dev->vbi_dev);
>  err_vdev:
> 


-- 
Shuah Khan
Sr. Linux Kernel Developer
Open Source Innovation Group
Samsung Research America (Silicon Valley)
shuahkh@....samsung.com | (970) 217-8978
--
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