On 5/7/25 18:09, Marek Szyprowski wrote:
Use common wrappers operating directly on the struct sg_table objects to fix incorrect use of scatterlists sync calls. dma_sync_sg_for_*() functions have to be called with the number of elements originally passed to dma_map_sg_*() function, not the one returned in sgtable's nents.
Fixes: 1ffe09590121 ("udmabuf: fix dma-buf cpu access") CC: stable@vger.kernel.org Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com Acked-by: Vivek Kasireddy vivek.kasireddy@intel.com
Reviewed-by: Christian König christian.koenig@amd.com
Should I push this one to drm-misc-fixes for upstreaming?
Regards, Christian.
drivers/dma-buf/udmabuf.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index 7eee3eb47a8e..c9d0c68d2fcb 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -264,8 +264,7 @@ static int begin_cpu_udmabuf(struct dma_buf *buf, ubuf->sg = NULL; } } else {
dma_sync_sg_for_cpu(dev, ubuf->sg->sgl, ubuf->sg->nents,direction);
dma_sync_sgtable_for_cpu(dev, ubuf->sg, direction);return ret; @@ -280,7 +279,7 @@ static int end_cpu_udmabuf(struct dma_buf *buf, if (!ubuf->sg) return -EINVAL;
- dma_sync_sg_for_device(dev, ubuf->sg->sgl, ubuf->sg->nents, direction);
- dma_sync_sgtable_for_device(dev, ubuf->sg, direction); return 0;
}