linux-kernel - [PATCH 4.4 134/137] staging: android: ion: Set the length of the DMA sg entries in buffer

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Message-Id: <20160418022515.958896534@linuxfoundation.org>
Date:	Mon, 18 Apr 2016 11:29:56 +0900
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Liviu Dudau <Liviu.Dudau@....com>,
	Jon Medhurst <tixy@...aro.org>,
	Laura Abbott <labbott@...hat.com>,
	Shawn Guo <shawnguo@...nel.org>
Subject: [PATCH 4.4 134/137] staging: android: ion: Set the length of the DMA sg entries in buffer

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

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

From: Liviu Dudau <Liviu.Dudau@....com>

commit 70bc916b2c80913753fb188d4daee50a64d21ba0 upstream.

ion_buffer_create() will allocate a buffer and then create a DMA
mapping for it, but it forgot to set the length of the page entries.

Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
Signed-off-by: Jon Medhurst <tixy@...aro.org>
Acked-by: Laura Abbott <labbott@...hat.com>
Cc: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/staging/android/ion/ion.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -251,8 +251,10 @@ static struct ion_buffer *ion_buffer_cre
 	 * memory coming from the heaps is ready for dma, ie if it has a
 	 * cached mapping that mapping has been invalidated
 	 */
-	for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, i)
+	for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, i) {
 		sg_dma_address(sg) = sg_phys(sg);
+		sg_dma_len(sg) = sg->length;
+	}
 	mutex_lock(&dev->buffer_lock);
 	ion_buffer_add(dev, buffer);
 	mutex_unlock(&dev->buffer_lock);