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    Subject[PATCH] drm/mgag200: Delete an unnecessary check before drm_gem_object_unreference_unlocked()
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    From: Markus Elfring <elfring@users.sourceforge.net>
    Date: Fri, 22 Jul 2016 11:20:27 +0200

    The drm_gem_object_unreference_unlocked() function tests whether
    its argument is NULL and then returns immediately.
    Thus the test around the call is not needed.

    This issue was detected by using the Coccinelle software.

    Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
    ---
    drivers/gpu/drm/mgag200/mgag200_main.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c b/drivers/gpu/drm/mgag200/mgag200_main.c
    index 615cbb0..13798b3 100644
    --- a/drivers/gpu/drm/mgag200/mgag200_main.c
    +++ b/drivers/gpu/drm/mgag200/mgag200_main.c
    @@ -17,8 +17,8 @@
    static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
    {
    struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
    - if (mga_fb->obj)
    - drm_gem_object_unreference_unlocked(mga_fb->obj);
    +
    + drm_gem_object_unreference_unlocked(mga_fb->obj);
    drm_framebuffer_cleanup(fb);
    kfree(fb);
    }
    --
    2.9.2
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