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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Vinod Koul <vinod.koul@intel.com>,
	linux-kernel@vger.kernel.org,
	Viresh Kumar <viresh.kumar@linaro.org>,
	spear-devel <spear-devel@list.st.com>
Subject: [PATCHv2 02/11] dma: at_hdmac: check direction properly for cyclic transfers
Date: Thu, 10 Jan 2013 10:52:57 +0200	[thread overview]
Message-ID: <1357807986-4026-3-git-send-email-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <1357807986-4026-1-git-send-email-andriy.shevchenko@linux.intel.com>

dma_transfer_direction is a normal enum. It means we can't usually use the
values as bit fields. Let's adjust this check and move it above the usage of
the direction parameter, due to the nature of the following usage of it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
---
 drivers/dma/at_hdmac.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 13a02f4..6e13f26 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -778,7 +778,7 @@ err:
  */
 static int
 atc_dma_cyclic_check_values(unsigned int reg_width, dma_addr_t buf_addr,
-		size_t period_len, enum dma_transfer_direction direction)
+		size_t period_len)
 {
 	if (period_len > (ATC_BTSIZE_MAX << reg_width))
 		goto err_out;
@@ -786,8 +786,6 @@ atc_dma_cyclic_check_values(unsigned int reg_width, dma_addr_t buf_addr,
 		goto err_out;
 	if (unlikely(buf_addr & ((1 << reg_width) - 1)))
 		goto err_out;
-	if (unlikely(!(direction & (DMA_DEV_TO_MEM | DMA_MEM_TO_DEV))))
-		goto err_out;
 
 	return 0;
 
@@ -886,14 +884,16 @@ atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
 		return NULL;
 	}
 
+	if (unlikely(!is_slave_direction(direction)))
+		goto err_out;
+
 	if (sconfig->direction == DMA_MEM_TO_DEV)
 		reg_width = convert_buswidth(sconfig->dst_addr_width);
 	else
 		reg_width = convert_buswidth(sconfig->src_addr_width);
 
 	/* Check for too big/unaligned periods and unaligned DMA buffer */
-	if (atc_dma_cyclic_check_values(reg_width, buf_addr,
-					period_len, direction))
+	if (atc_dma_cyclic_check_values(reg_width, buf_addr, period_len))
 		goto err_out;
 
 	/* build cyclic linked list */
-- 
1.7.10.4


  parent reply	other threads:[~2013-01-10  8:56 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-10  8:52 [PATCHv2 00/11] patches against slave dma subsystem Andy Shevchenko
2013-01-10  8:52 ` [PATCHv2 01/11] dmaengine: introduce is_slave_direction function Andy Shevchenko
2013-01-10  8:52 ` Andy Shevchenko [this message]
2013-01-10  8:52 ` [PATCHv2 03/11] dma: dw_dmac: check direction properly in dw_dma_cyclic_prep Andy Shevchenko
2013-01-10  8:52 ` [PATCHv2 04/11] dma: ep93xx_dma: reuse is_slave_direction helper Andy Shevchenko
2013-01-10  8:53 ` [PATCHv2 05/11] dma: ipu_idmac: " Andy Shevchenko
2013-01-10  8:53 ` [PATCHv2 06/11] dma: ste_dma40: " Andy Shevchenko
2013-01-10  8:53 ` [PATCHv2 07/11] dw_dmac: call .probe after we have a device in place Andy Shevchenko
2013-01-10  8:53 ` [PATCHv2 08/11] dw_dmac: store direction in the custom channel structure Andy Shevchenko
2013-01-10  8:53 ` [PATCHv2 09/11] dw_dmac: make usage of dw_dma_slave optional Andy Shevchenko
2013-01-10  9:08   ` Andy Shevchenko
2013-01-10  9:11     ` [PATCHv2.1] " Andy Shevchenko
2013-01-10  8:53 ` [PATCHv2 10/11] dw_dmac: backlink to dw_dma in dw_dma_chan is superfluous Andy Shevchenko
2013-01-10  8:53 ` [PATCHv2 11/11] dma: dw_dmac: clear suspend bit during termination Andy Shevchenko
2013-01-12 13:09 ` [PATCHv2 00/11] patches against slave dma subsystem Vinod Koul

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