linux-kernel - [PATCH 7/8] dmatest: fix automatic buffer unmap type

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Message-Id: <1298679805-14108-8-git-send-email-iws@ovro.caltech.edu>
Date:	Fri, 25 Feb 2011 16:23:24 -0800
From:	"Ira W. Snyder" <iws@...o.caltech.edu>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org, leoli@...escale.com,
	dan.j.williams@...el.com, "Ira W. Snyder" <iws@...o.caltech.edu>
Subject: [PATCH 7/8] dmatest: fix automatic buffer unmap type

The dmatest code relies on the DMAEngine API to automatically call
dma_unmap_single() on src buffers. The flags it passes are incorrect,
fix them.

Signed-off-by: Ira W. Snyder <iws@...o.caltech.edu>
---
 drivers/dma/dmatest.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 5589358..7e1b0aa 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -285,7 +285,12 @@ static int dmatest_func(void *data)
 
 	set_user_nice(current, 10);
 
-	flags = DMA_CTRL_ACK | DMA_COMPL_SKIP_DEST_UNMAP | DMA_PREP_INTERRUPT;
+	/*
+	 * src buffers are freed by the DMAEngine code with dma_unmap_single()
+	 * dst buffers are freed by ourselves below
+	 */
+	flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT
+	      | DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE;
 
 	while (!kthread_should_stop()
 	       && !(iterations && total_tests >= iterations)) {
-- 
1.7.3.4

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