On 12/01/2021 12:07, Kieran Bingham wrote:
> Hi Ricardo,
>
> On 11/01/2021 14:54, Ricardo Ribalda wrote:
>> Core code already clears reserved fields of struct
>> v4l2_pix_format_mplane, check: 4e1e0eb0e074 ("media: v4l2-ioctl: Zero
>> v4l2_plane_pix_format reserved fields").
>>
>> Cc: Mikhail Ulyanov <mikhail.ulyanov@xxxxxxxxxxxxxxxxxx>
>> Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
>> ---
>> drivers/media/platform/rcar_jpu.c | 5 -----
>> 1 file changed, 5 deletions(-)
>>
>> diff --git a/drivers/media/platform/rcar_jpu.c b/drivers/media/platform/rcar_jpu.c
>> index 9b99ff368698..2bddc957cb87 100644
>> --- a/drivers/media/platform/rcar_jpu.c
>> +++ b/drivers/media/platform/rcar_jpu.c
>
> There's a memset(cap->reserved...) in jpu_querycap()
>
> Is that also applicable and covered by the core?
Yes: VIDIOC_QUERYCAP is a read-only ioctl: the core will always zero
the struct in that case before handing it over to the driver.
This is something for a separate patch, though. There may well be
more drivers that do this for querycap.
Regards,
Hans
>
> Looking at v4l_querycap() it doesn't seem to be so:
>
>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
>
>> @@ -793,7 +793,6 @@ static int __jpu_try_fmt(struct jpu_ctx *ctx, struct jpu_fmt **fmtinfo,
>> pix->colorspace = fmt->colorspace;
>> pix->field = V4L2_FIELD_NONE;
>> pix->num_planes = fmt->num_planes;
>> - memset(pix->reserved, 0, sizeof(pix->reserved));
>>
>> jpu_bound_align_image(&pix->width, JPU_WIDTH_MIN, JPU_WIDTH_MAX,
>> fmt->h_align, &pix->height, JPU_HEIGHT_MIN,
>> @@ -808,8 +807,6 @@ static int __jpu_try_fmt(struct jpu_ctx *ctx, struct jpu_fmt **fmtinfo,
>> pix->plane_fmt[0].sizeimage = JPU_JPEG_HDR_SIZE +
>> (JPU_JPEG_MAX_BYTES_PER_PIXEL * w * h);
>> pix->plane_fmt[0].bytesperline = 0;
>> - memset(pix->plane_fmt[0].reserved, 0,
>> - sizeof(pix->plane_fmt[0].reserved));
>> } else {
>> unsigned int i, bpl = 0;
>>
>> @@ -822,8 +819,6 @@ static int __jpu_try_fmt(struct jpu_ctx *ctx, struct jpu_fmt **fmtinfo,
>> for (i = 0; i < pix->num_planes; ++i) {
>> pix->plane_fmt[i].bytesperline = bpl;
>> pix->plane_fmt[i].sizeimage = bpl * h * fmt->bpp[i] / 8;
>> - memset(pix->plane_fmt[i].reserved, 0,
>> - sizeof(pix->plane_fmt[i].reserved));
>> }
>> }
>>
>>
>
