This is a note to let you know that I've just added the patch titled

staging: android: ion: Fix dma direction for dma_sync_sg_for_cpu/device

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: staging-android-ion-fix-dma-direction-for-dma_sync_sg_for_cpu-device.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From d6b246bb7a29703f53aa4c050b8b3205d749caee Mon Sep 17 00:00:00 2001

From: Sushmita Susheelendra ssusheel@codeaurora.org Date: Fri, 15 Dec 2017 13:59:13 -0700 Subject: staging: android: ion: Fix dma direction for dma_sync_sg_for_cpu/device

From: Sushmita Susheelendra ssusheel@codeaurora.org

commit d6b246bb7a29703f53aa4c050b8b3205d749caee upstream.

Use the direction argument passed into begin_cpu_access and end_cpu_access when calling the dma_sync_sg_for_cpu/device. The actual cache primitive called depends on the direction passed in.

Signed-off-by: Sushmita Susheelendra ssusheel@codeaurora.org Acked-by: Laura Abbott labbott@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/staging/android/ion/ion.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -348,7 +348,7 @@ static int ion_dma_buf_begin_cpu_access( mutex_lock(&buffer->lock); list_for_each_entry(a, &buffer->attachments, list) { dma_sync_sg_for_cpu(a->dev, a->table->sgl, a->table->nents, - DMA_BIDIRECTIONAL); + direction); } mutex_unlock(&buffer->lock);

@@ -370,7 +370,7 @@ static int ion_dma_buf_end_cpu_access(st mutex_lock(&buffer->lock); list_for_each_entry(a, &buffer->attachments, list) { dma_sync_sg_for_device(a->dev, a->table->sgl, a->table->nents, - DMA_BIDIRECTIONAL); + direction); } mutex_unlock(&buffer->lock);

Patches currently in stable-queue which might be from ssusheel@codeaurora.org are

queue-4.14/staging-android-ion-fix-dma-direction-for-dma_sync_sg_for_cpu-device.patch