linux-kernel - [v3 PATCH 02/12] spi/atmel_spi: call unmapping on transfers buffers

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Date:	Mon,  7 Jan 2013 09:50:03 +0800
From:	Wenyou Yang <wenyou.yang@...el.com>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org, nicolas.ferre@...el.com,
	plagnioj@...osoft.com, richard.genoud@...il.com, JM.Lin@...el.com,
	wenyou.yang@...el.com, grant.likely@...retlab.ca,
	spi-devel-general@...ts.sourceforge.net
Subject: [v3 PATCH 02/12] spi/atmel_spi: call unmapping on transfers buffers

From: Nicolas Ferre <nicolas.ferre@...el.com>

Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
Cc: grant.likely@...retlab.ca
Cc: spi-devel-general@...ts.sourceforge.net
---
 drivers/spi/spi-atmel.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 4516839..9782206 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1016,6 +1016,7 @@ static int atmel_spi_remove(struct platform_device *pdev)
 	struct spi_master	*master = platform_get_drvdata(pdev);
 	struct atmel_spi	*as = spi_master_get_devdata(master);
 	struct spi_message	*msg;
+	struct spi_transfer	*xfer;
 
 	/* reset the hardware and block queue progress */
 	spin_lock_irq(&as->lock);
@@ -1027,9 +1028,10 @@ static int atmel_spi_remove(struct platform_device *pdev)
 
 	/* Terminate remaining queued transfers */
 	list_for_each_entry(msg, &as->queue, queue) {
-		/* REVISIT unmapping the dma is a NOP on ARM and AVR32
-		 * but we shouldn't depend on that...
-		 */
+		list_for_each_entry(xfer, &msg->transfers, transfer_list) {
+			if (!msg->is_dma_mapped)
+				atmel_spi_dma_unmap_xfer(master, xfer);
+		}
 		msg->status = -ESHUTDOWN;
 		msg->complete(msg->context);
 	}
-- 
1.7.9.5

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