Re: [RESEND][PATCH 1/3] dma-buf: system_heap: Make sure to return an error if we abort

[Sumit Semwal]

Hi John,

On Wed, 20 Jan 2021 at 02:15, John Stultz <john.stultz@xxxxxxxxxx> wrote:
>
> If we abort from the allocation due to a fatal_signal_pending(),
> be sure we report an error so any return code paths don't trip
> over the fact that the allocation didn't succeed.

Thanks for the patch; LGTM, will push into drm-misc-next.
>
> Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
> Cc: Liam Mark <lmark@xxxxxxxxxxxxxx>
> Cc: Laura Abbott <labbott@xxxxxxxxxx>
> Cc: Brian Starkey <Brian.Starkey@xxxxxxx>
> Cc: Hridya Valsaraju <hridya@xxxxxxxxxx>
> Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
> Cc: Sandeep Patil <sspatil@xxxxxxxxxx>
> Cc: Daniel Mentz <danielmentz@xxxxxxxxxx>
> Cc: Chris Goldsworthy <cgoldswo@xxxxxxxxxxxxxx>
> Cc: Ørjan Eide <orjan.eide@xxxxxxx>
> Cc: Robin Murphy <robin.murphy@xxxxxxx>
> Cc: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
> Cc: Simon Ser <contact@xxxxxxxxxxx>
> Cc: James Jones <jajones@xxxxxxxxxx>
> Cc: linux-media@xxxxxxxxxxxxxxx
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Suggested-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
> Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
> ---
>  drivers/dma-buf/heaps/system_heap.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c
> index 17e0e9a68baf..405351aad2a8 100644
> --- a/drivers/dma-buf/heaps/system_heap.c
> +++ b/drivers/dma-buf/heaps/system_heap.c
> @@ -363,8 +363,10 @@ static int system_heap_allocate(struct dma_heap *heap,
>                  * Avoid trying to allocate memory if the process
>                  * has been killed by SIGKILL
>                  */
> -               if (fatal_signal_pending(current))
> +               if (fatal_signal_pending(current)) {
> +                       ret = -EINTR;
>                         goto free_buffer;
> +               }
>
>                 page = alloc_largest_available(size_remaining, max_order);
>                 if (!page)
> --
> 2.17.1
>

Best,
Sumit.