linux-kernel - [PATCH 4.14 137/146] staging: android: ion: Fix dma direction for dma_sync_sg_for

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Date:   Mon,  1 Jan 2018 15:38:48 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Sushmita Susheelendra <ssusheel@...eaurora.org>,
        Laura Abbott <labbott@...hat.com>
Subject: [PATCH 4.14 137/146] staging: android: ion: Fix dma direction for dma_sync_sg_for_cpu/device

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sushmita Susheelendra <ssusheel@...eaurora.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@...eaurora.org>
Acked-by: Laura Abbott <labbott@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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);