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author | Guangming <Guangming.Cao@mediatek.com> | 2021-11-26 15:49:04 +0800 |
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committer | Sumit Semwal <sumit.semwal@linaro.org> | 2021-12-01 15:30:10 +0530 |
commit | 679d94cd7d900871e5bc9cf780bd5b73af35ab42 (patch) | |
tree | 4ddd6f579b6f88faa03f35b3e36b5fb0717d61f6 /drivers/gpu/drm | |
parent | 6052a3110be208e547a4a8aeb184446199a16e8a (diff) | |
download | linux-stable-679d94cd7d900871e5bc9cf780bd5b73af35ab42.tar.gz linux-stable-679d94cd7d900871e5bc9cf780bd5b73af35ab42.tar.bz2 linux-stable-679d94cd7d900871e5bc9cf780bd5b73af35ab42.zip |
dma-buf: system_heap: Use 'for_each_sgtable_sg' in pages free flow
For previous version, it uses 'sg_table.nent's to traverse sg_table in pages
free flow.
However, 'sg_table.nents' is reassigned in 'dma_map_sg', it means the number of
created entries in the DMA adderess space.
So, use 'sg_table.nents' in pages free flow will case some pages can't be freed.
Here we should use sg_table.orig_nents to free pages memory, but use the
sgtable helper 'for each_sgtable_sg'(, instead of the previous rather common
helper 'for_each_sg' which maybe cause memory leak) is much better.
Fixes: d963ab0f15fb0 ("dma-buf: system_heap: Allocate higher order pages if available")
Signed-off-by: Guangming <Guangming.Cao@mediatek.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Cc: <stable@vger.kernel.org> # 5.11.*
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211126074904.88388-1-guangming.cao@mediatek.com
Diffstat (limited to 'drivers/gpu/drm')
0 files changed, 0 insertions, 0 deletions