Subject: [PATCH 1/6] [media] s5p-mfc: set capablity bus_info as required by VIDIOC_QUERYCAP

From: [email-masked] (Shuah Khan)
Date: Wed, 29 Jun 2016 13:43:08 -0600

On 06/16/2016 03:40 PM, Javier Martinez Canillas wrote:
> The driver doesn't set the struct v4l2_capability bus_info field so the
> v4l2-compliance tool reports the following errors for VIDIOC_QUERYCAP:
> 
> Required ioctls:
>                 VIDIOC_QUERYCAP returned 0 (Success)
>                 fail: v4l2-compliance.cpp(304): string empty
>                 fail: v4l2-compliance.cpp(528): check_ustring(vcap.bus_info, sizeof(vcap.bus_info))
>         test VIDIOC_QUERYCAP: FAIL
> 
> This patch fixes by setting the field in VIDIOC_QUERYCAP ioctl handler:
> 
> Required ioctls:
>                 VIDIOC_QUERYCAP returned 0 (Success)
>         test VIDIOC_QUERYCAP: OK
> 
> Signed-off-by: Javier Martinez Canillas <[email-masked]>

I started making the very same changes. Looks good.

Reviewed-by: Shuah Khan <[email-masked]>

-- Shuah
> ---
> 
>  drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 3 ++-
>  drivers/media/platform/s5p-mfc/s5p_mfc_enc.c | 3 ++-
>  2 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> index f2d6376ce618..4a40df22fd63 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> @@ -267,7 +267,8 @@ static int vidioc_querycap(struct file *file, void *priv,
>  
>  	strncpy(cap->driver, dev->plat_dev->name, sizeof(cap->driver) - 1);
>  	strncpy(cap->card, dev->plat_dev->name, sizeof(cap->card) - 1);
> -	cap->bus_info[0] = 0;
> +	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
> +		 dev_name(&dev->plat_dev->dev));
>  	/*
>  	 * This is only a mem-to-mem video device. The capture and output
>  	 * device capability flags are left only for backward compatibility
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> index 034b5c1d35a1..dd466ea6429e 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> @@ -945,7 +945,8 @@ static int vidioc_querycap(struct file *file, void *priv,
>  
>  	strncpy(cap->driver, dev->plat_dev->name, sizeof(cap->driver) - 1);
>  	strncpy(cap->card, dev->plat_dev->name, sizeof(cap->card) - 1);
> -	cap->bus_info[0] = 0;
> +	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
> +		 dev_name(&dev->plat_dev->dev));
>  	/*
>  	 * This is only a mem-to-mem video device. The capture and output
>  	 * device capability flags are left only for backward compatibility
>