6.6-stable review patch. If anyone has any objections, please let me know.
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From: Marek Szyprowski m.szyprowski@samsung.com
commit afe382843717d44b24ef5014d57dcbaab75a4052 upstream.
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 Signed-off-by: Christian König christian.koenig@amd.com Link: https://lore.kernel.org/r/20250507160913.2084079-3-m.szyprowski@samsung.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/dma-buf/udmabuf.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -161,8 +161,7 @@ static int begin_cpu_udmabuf(struct dma_ 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; @@ -177,7 +176,7 @@ static int end_cpu_udmabuf(struct dma_bu 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; }