[PATCH] drm/panfrost: Fix the panfrost_mmu_map_fault_addr() error path

[Steven Price]

On 21/05/2021 10:38, Boris Brezillon wrote:
> Make sure all bo->base.pages entries are either NULL or pointing to a
> valid page before calling drm_gem_shmem_put_pages().
> 
> Reported-by: Tomeu Vizoso <tomeu.vizoso at collabora.com>
> Cc: <stable at vger.kernel.org>
> Fixes: 187d2929206e ("drm/panfrost: Add support for GPU heap allocations")
> Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>

Reviewed-by: Steven Price <steven.price at arm.com>

> ---
>  drivers/gpu/drm/panfrost/panfrost_mmu.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
> index 569509c2ba27..d76dff201ea6 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
> @@ -460,6 +460,7 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
>  		if (IS_ERR(pages[i])) {
>  			mutex_unlock(&bo->base.pages_lock);
>  			ret = PTR_ERR(pages[i]);
> +			pages[i] = NULL;
>  			goto err_pages;
>  		}
>  	}
>