[Lima] [PATCH] drm/lima: fix lima_gem_wait() return value

[Qiang Yu]

Oh, I was miss leading by the drm_gem_reservation_object_wait
comments. Patch is:
Reviewed-by: Qiang Yu <yuq825 at gmail.com>

I'll apply this patch to drm-misc-next.

Current kernel release is 5.3-rc8, is it too late for this fix to go
into the mainline 5.3 release?
I'd like to know how to apply this fix for current rc kernels, by
drm-misc-fixes? Can I push
to drm-misc-fixes by dim or I can only push to drm-misc-next and
drm-misc maintainer will
pick fixes from it to drm-misc-fixes?

Thanks,
Qiang

On Sun, Sep 8, 2019 at 10:48 AM Vasily Khoruzhick <anarsoul at gmail.com> wrote:
>
> drm_gem_reservation_object_wait() returns 0 if it succeeds and -ETIME
> if it timeouts, but lima driver assumed that 0 is error.
>
> Cc: stable at vger.kernel.org
> Signed-off-by: Vasily Khoruzhick <anarsoul at gmail.com>
> ---
>  drivers/gpu/drm/lima/lima_gem.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
> index 477c0f766663..b609dc030d6c 100644
> --- a/drivers/gpu/drm/lima/lima_gem.c
> +++ b/drivers/gpu/drm/lima/lima_gem.c
> @@ -342,7 +342,7 @@ int lima_gem_wait(struct drm_file *file, u32 handle, u32 op, s64 timeout_ns)
>         timeout = drm_timeout_abs_to_jiffies(timeout_ns);
>
>         ret = drm_gem_reservation_object_wait(file, handle, write, timeout);
> -       if (ret == 0)
> +       if (ret == -ETIME)
>                 ret = timeout ? -ETIMEDOUT : -EBUSY;
>
>         return ret;
> --
> 2.23.0
>