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SubjectRe: [PATCH] drm/tegra: submit: No need for Null pointer check before kfree
From
On 12/27/22 19:14, Deepak R Varma wrote:
> kfree() & vfree() internally perform NULL check on the pointer handed
> to it and take no action if it indeed is NULL. Hence there is no need
> for a pre-check of the memory pointer before handing it to
> kfree()/vfree().
>
> Issue reported by ifnullfree.cocci Coccinelle semantic patch script.
>
> Signed-off-by: Deepak R Varma <drv@mailo.com>
> ---
> drivers/gpu/drm/tegra/submit.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/tegra/submit.c b/drivers/gpu/drm/tegra/submit.c
> index 066f88564169..06f836db99d0 100644
> --- a/drivers/gpu/drm/tegra/submit.c
> +++ b/drivers/gpu/drm/tegra/submit.c
> @@ -680,8 +680,8 @@ int tegra_drm_ioctl_channel_submit(struct drm_device *drm, void *data,
> kfree(job_data->used_mappings);
> }
>
> - if (job_data)
> - kfree(job_data);
> + kfree(job_data);
> +
> put_bo:
> gather_bo_put(&bo->base);
> unlock:
> --
> 2.34.1
>
>
>

It continues to be the case that I think this transform is bad. Same
applies to the host1x patch.

Mikko

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