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| author |   Tomi Valkeinen <tomi.valkeinen@ti.com> | 2019-11-14 10:03:43 +0200 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2019-12-04 19:11:28 +0200 |
| commit | d9c148cfaf0a99296ad7c92fb8b65952196053ec (patch) | |
| tree | 16c52ad673b2b2c92e08ada351c5d2ea79794e76 /net | |
| parent | drm/dp_mst: Fix build on systems with STACKTRACE_SUPPORT=n (diff) | |
| download | linux-dev-d9c148cfaf0a99296ad7c92fb8b65952196053ec.tar.xz linux-dev-d9c148cfaf0a99296ad7c92fb8b65952196053ec.zip | |
drm/omap: fix dma_addr refcounting
cec4fa7511ef7a73eb635834e9d85b25a5b47a98 ("drm/omap: use refcount API to
track the number of users of dma_addr") changed omap_gem.c to use
refcounting API to track dma_addr uses. However, the driver only tracks
the refcounts for non-contiguous buffers, and the patch didn't fully
take this in account.
After the patch, the driver always decreased refcount in omap_gem_unpin,
instead of decreasing the refcount only for non-contiguous buffers. This
leads to refcounting mismatch.
As for the contiguous cases the refcount is never increased, fix this
issue by returning from omap_gem_unpin if the buffer being unpinned is
contiguous.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191114080343.30704-1-tomi.valkeinen@ti.com
Fixes: cec4fa7511ef ("drm/omap: use refcount API to track the number of users of dma_addr")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions