[PATCH 2/7] k3dma: Fix hisi burst clipping

From	John Stultz <john.stultz@linaro.org>
Newsgroups	linux.kernel
Subject	[PATCH 2/7] k3dma: Fix hisi burst clipping
Date	2016-08-09 02:20 +0200
Message-ID	<s42VX-7N-7@gated-at.bofh.it> (permalink)
References	<s42VX-7N-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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From: Andy Green <andy.green@linaro.org>

Max burst len is a 4-bit field, but at the moment it's clipped with
a 5-bit constant... reduce it to that which can be expressed

Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Andy Green <andy@warmcat.com>
Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Andy Green <andy.green@linaro.org>
[jstultz: Forward ported to mainline]
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 drivers/dma/k3dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
index 39de898..3d51469 100644
--- a/drivers/dma/k3dma.c
+++ b/drivers/dma/k3dma.c
@@ -551,7 +551,7 @@ static int k3_dma_config(struct dma_chan *chan,
 	c->ccfg |= (val << 12) | (val << 16);
 
 	if ((maxburst == 0) || (maxburst > 16))
-		val = 16;
+		val = 15;
 	else
 		val = maxburst - 1;
 	c->ccfg |= (val << 20) | (val << 24);
-- 
1.9.1

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[PATCH 2/7] k3dma: Fix hisi burst clipping John Stultz <john.stultz@linaro.org> - 2016-08-09 02:20 +0200

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