linux-kernel - [PATCH v2 01/13] dmatest: make driver unmap also source buffers by itself

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Date:	Fri, 18 Oct 2013 19:35:21 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	dan.j.williams@...el.com
Cc:	vinod.koul@...el.com, dave.jiang@...el.com, t.figa@...sung.com,
	kyungmin.park@...sung.com, linux@....linux.org.uk,
	linux-kernel@...r.kernel.org, b.zolnierkie@...sung.com,
	Dan Williams <djbw@...com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v2 01/13] dmatest: make driver unmap also source buffers by
 itself

Make the driver DMA unmap also source buffers by itself
(currently it DMA unmaps only destination buffers) as
a preparation for introducing generic 'ummap' data.

Cc: Dan Williams <djbw@...com>
Cc: Vinod Koul <vinod.koul@...el.com>
Cc: Tomasz Figa <t.figa@...sung.com>
Cc: Dave Jiang <dave.jiang@...el.com>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 drivers/dma/dmatest.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 92f796c..f4a2a25 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -597,11 +597,10 @@ static int dmatest_func(void *data)
 	set_user_nice(current, 10);
 
 	/*
-	 * src buffers are freed by the DMAEngine code with dma_unmap_single()
-	 * dst buffers are freed by ourselves below
+	 * src and dst buffers are freed by ourselves below
 	 */
-	flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT
-	      | DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE;
+	flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT |
+		DMA_COMPL_SKIP_SRC_UNMAP | DMA_COMPL_SKIP_DEST_UNMAP;
 
 	while (!kthread_should_stop()
 	       && !(params->iterations && total_tests >= params->iterations)) {
@@ -750,7 +749,8 @@ static int dmatest_func(void *data)
 			continue;
 		}
 
-		/* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */
+		/* Unmap by myself */
+		unmap_src(dev->dev, dma_srcs, len, src_cnt);
 		unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt);
 
 		error_count = 0;
-- 
1.8.2.3

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