linux-kernel - Re: [1/2] drm/shmem-helper: Remove errant put in error path

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Message-ID: <20221129201149.GA2131686@roeck-us.net>
Date:   Tue, 29 Nov 2022 12:13:13 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Rob Clark <robdclark@...il.com>
Cc:     dri-devel@...ts.freedesktop.org,
        Rob Clark <robdclark@...omium.org>,
        open list <linux-kernel@...r.kernel.org>,
        stable@...r.kernel.org, Eric Anholt <eric@...olt.net>,
        Noralf Trønnes <noralf@...nnes.org>,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: [1/2] drm/shmem-helper: Remove errant put in error path

On Tue, Nov 29, 2022 at 12:02:41PM -0800, Rob Clark wrote:
> From: Rob Clark <robdclark@...omium.org>
> 
> drm_gem_shmem_mmap() doesn't own this reference!
> 

I think the impact should be explained further.

> Fixes: 2194a63a818d ("drm: Add library for shmem backed GEM objects")
> Cc: stable@...r.kernel.org
> Signed-off-by: Rob Clark <robdclark@...omium.org>
> ---
>  drivers/gpu/drm/drm_gem_shmem_helper.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index 35138f8a375c..110a9eac2af8 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -623,7 +623,6 @@ int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct
>  
>  	ret = drm_gem_shmem_get_pages(shmem);
>  	if (ret) {
> -		drm_gem_vm_close(vma);
>  		return ret;
>  	}

Drop the now unnecessary { }

Also, consider adding Reported-by: and possibly Suggested-by:.

Thanks,
Guenter