drm/panfrost: Fix shrinker list corruption by madvise IOCTL
commit 9fc33eaa upstream. Calling madvise IOCTL twice on BO causes memory shrinker list corruption and crashes kernel because BO is already on the list and it's added to the list again, while BO should be removed from the list before it's re-added. Fix it. Cc: stable@vger.kernel.org Fixes: 013b6510 ("drm/panfrost: Add madvise and shrinker support") Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Reviewed-by: Steven Price <steven.price@arm.com> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Signed-off-by: Steven Price <steven.price@arm.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220630200601.1884120-3-dmitry.osipenko@collabora.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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