Hi Arnd,
On Sun, May 16, 2021 at 10:47:43PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> This is one of the last remaining users of compat_alloc_user_space()
> and copy_in_user(), which are in the process of getting removed.
>
> As of commit 57e6b6f2303e ("media: atomisp_fops.c: disable
> atomisp_compat_ioctl32"), nothing in this file is actually getting used
> as the only reference has been stubbed out.
This patch was made redundant by another one that fixed the bug. But I
guess you're right in the sense that no-one could have used this because of
the patch that disabled it.
So:
Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
But:
> diff --git a/drivers/staging/media/atomisp/pci/atomisp_fops.c b/drivers/staging/media/atomisp/pci/atomisp_fops.c
> index f1e6b2597853..e383e17c5072 100644
> --- a/drivers/staging/media/atomisp/pci/atomisp_fops.c
> +++ b/drivers/staging/media/atomisp/pci/atomisp_fops.c
> @@ -1283,7 +1283,8 @@ const struct v4l2_file_operations atomisp_fops = {
> .unlocked_ioctl = video_ioctl2,
> #ifdef CONFIG_COMPAT
> /*
> - * There are problems with this code. Disable this for now.
> + * this was removed because of bugs, the interface
> + * needs to be made safe for compat tasks instead.
> .compat_ioctl32 = atomisp_compat_ioctl32,
I think the comment could go, too.
> */
> #endif
> @@ -1297,10 +1298,7 @@ const struct v4l2_file_operations atomisp_file_fops = {
> .mmap = atomisp_file_mmap,
> .unlocked_ioctl = video_ioctl2,
> #ifdef CONFIG_COMPAT
> - /*
> - * There are problems with this code. Disable this for now.
> - .compat_ioctl32 = atomisp_compat_ioctl32,
> - */
> + /* .compat_ioctl32 = atomisp_compat_ioctl32, */
Thie one, too.
> #endif
> .poll = atomisp_poll,
> };
--
Kind regards,
Sakari Ailus
