On 28/06/2024 15:55, Boris Brezillon wrote:
> The user is likely to leave all the drm_panthor_obj_array fields
> to zero when the array is empty, which will cause an EINVAL failure.
>
> Fixes: 4bdca1150792 ("drm/panthor: Add the driver frontend block")
> Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Reviewed-by: Steven Price <steven.price@xxxxxxx>
> ---
> drivers/gpu/drm/panthor/panthor_drv.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/panthor/panthor_drv.c b/drivers/gpu/drm/panthor/panthor_drv.c
> index b8a84f26b3ef..b5e7b919f241 100644
> --- a/drivers/gpu/drm/panthor/panthor_drv.c
> +++ b/drivers/gpu/drm/panthor/panthor_drv.c
> @@ -86,15 +86,15 @@ panthor_get_uobj_array(const struct drm_panthor_obj_array *in, u32 min_stride,
> int ret = 0;
> void *out_alloc;
>
> + if (!in->count)
> + return NULL;
> +
> /* User stride must be at least the minimum object size, otherwise it might
> * lack useful information.
> */
> if (in->stride < min_stride)
> return ERR_PTR(-EINVAL);
>
> - if (!in->count)
> - return NULL;
> -
> out_alloc = kvmalloc_array(in->count, obj_size, GFP_KERNEL);
> if (!out_alloc)
> return ERR_PTR(-ENOMEM);
