linux-kernel - [PATCH 059/115] gpu: ion: Only flush buffers in the chunk heap if they were used cached

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Message-Id: <1386973529-4884-60-git-send-email-john.stultz@linaro.org>
Date:	Fri, 13 Dec 2013 14:24:33 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Android Kernel Team <kernel-team@...roid.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Jesse Barker <jesse.barker@....com>,
	Colin Cross <ccross@...roid.com>,
	Rebecca Schultz Zavin <rebecca@...roid.com>,
	John Stultz <john.stultz@...aro.org>
Subject: [PATCH 059/115] gpu: ion: Only flush buffers in the chunk heap if they were used cached

From: Rebecca Schultz Zavin <rebecca@...roid.com>

Signed-off-by: Rebecca Schultz Zavin <rebecca@...roid.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
 drivers/staging/android/ion/ion_chunk_heap.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/android/ion/ion_chunk_heap.c b/drivers/staging/android/ion/ion_chunk_heap.c
index 5582909..60cd91c 100644
--- a/drivers/staging/android/ion/ion_chunk_heap.c
+++ b/drivers/staging/android/ion/ion_chunk_heap.c
@@ -104,8 +104,9 @@ static void ion_chunk_heap_free(struct ion_buffer *buffer)
 	ion_heap_buffer_zero(buffer);
 
 	for_each_sg(table->sgl, sg, table->nents, i) {
-		__dma_page_cpu_to_dev(sg_page(sg), 0, sg_dma_len(sg),
-				      DMA_BIDIRECTIONAL);
+		if (ion_buffer_cached(buffer))
+			__dma_page_cpu_to_dev(sg_page(sg), 0, sg_dma_len(sg),
+					      DMA_BIDIRECTIONAL);
 		gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
 			      sg_dma_len(sg));
 	}
-- 
1.8.3.2

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