samsung_sm8750/android_kernel_samsung_sm8750
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

udmabuf: use sgtable-based scatterlist wrappers

Browse Source 
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: 1ffe095901 ("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>
This commit is contained in:
Marek Szyprowski
2025-05-07 18:09:12 +02:00
committed by Greg Kroah-Hartman
parent bfa4d86e13
commit 372b511e93
1 changed files with 2 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/dma-buf/udmabuf.c
View File

@@ -161,8 +161,7 @@ static int begin_cpu_udmabuf(struct dma_buf *buf,
ubuf->sg = NULL; ubuf->sg = NULL;
} }
} else { } else {
dma_sync_sg_for_cpu(dev, ubuf->sg->sgl, ubuf->sg->nents, dma_sync_sgtable_for_cpu(dev, ubuf->sg, direction);
direction);
} }
return ret; return ret;
@@ -177,7 +176,7 @@ static int end_cpu_udmabuf(struct dma_buf *buf,
if (!ubuf->sg) if (!ubuf->sg)
return -EINVAL; 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; return 0;
} }