Re: [PATCH] drm/i915/selftests: fix a couple IS_ERR() vs NULL tests

[Matthew Auld <matthew.auld@xxxxxxxxx>]

On 08/07/2022 09:40, Dan Carpenter wrote:
> The shmem_pin_map() function doesn't return error pointers, it returns
> NULL.
>
> Fixes: a0d3fdb628b8 ("drm/i915/gt: Split logical ring contexts from execlist submission"

I think this should be:

Fixes: be1cb55a07bf ("drm/i915/gt: Keep a no-frills swappable copy of 
the default context state")

> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

There looks to be one more in gvt/cmd_parser.c?

Otherwise,
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>

> ---
>   drivers/gpu/drm/i915/gt/selftest_lrc.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
> index 8b2c11dbe354..1109088fe8f6 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
> @@ -176,8 +176,8 @@ static int live_lrc_layout(void *arg)
>   			continue;
>   
>   		hw = shmem_pin_map(engine->default_state);
> -		if (IS_ERR(hw)) {
> -			err = PTR_ERR(hw);
> +		if (!hw) {
> +			err = -ENOMEM;
>   			break;
>   		}
>   		hw += LRC_STATE_OFFSET / sizeof(*hw);
> @@ -365,8 +365,8 @@ static int live_lrc_fixed(void *arg)
>   			continue;
>   
>   		hw = shmem_pin_map(engine->default_state);
> -		if (IS_ERR(hw)) {
> -			err = PTR_ERR(hw);
> +		if (!hw) {
> +			err = -ENOMEM;
>   			break;
>   		}
>   		hw += LRC_STATE_OFFSET / sizeof(*hw);