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authorChristian König <christian.koenig@amd.com>2022-07-15 09:57:22 +0200
committerChristian König <christian.koenig@amd.com>2022-07-18 09:18:53 +0200
commitdbd0da2453c694f2f74651834d90fb280b57f151 (patch)
tree0118d6aa78d7d7425ef58a031f45344e32f7cde8 /drivers/leds
parent9b04369b060fd4885f728b7a4ab4851ffb1abb64 (diff)
downloadlinux-dbd0da2453c694f2f74651834d90fb280b57f151.tar.bz2
drm/ttm: fix locking in vmap/vunmap TTM GEM helpers
I've stumbled over this while reviewing patches for DMA-buf and it looks like we completely messed the locking up here. In general most TTM function should only be called while holding the appropriate BO resv lock. Without this we could break the internal buffer object state here. Only compile tested! Signed-off-by: Christian König <christian.koenig@amd.com> Fixes: 43676605f890 ("drm/ttm: Add vmap/vunmap to TTM and TTM GEM helpers") Cc: stable@vger.kernel.org Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220715111533.467012-1-christian.koenig@amd.com
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