From: fabio.baltieri@linaro.org (Fabio Baltieri)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/7] dmaengine: ste_dma40: limit burst size to 16
Date: Wed, 12 Dec 2012 10:37:18 +0100 [thread overview]
Message-ID: <1355305041-2338-5-git-send-email-fabio.baltieri@linaro.org> (raw)
In-Reply-To: <1355305041-2338-1-git-send-email-fabio.baltieri@linaro.org>
From: Per Forlin <per.forlin@stericsson.com>
The client is not aware of the maximum burst size in the dma driver. If
the size exceeds 16 set max to 16.
Signed-off-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
---
drivers/dma/ste_dma40.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 16c96f5..0b80ee9 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2579,6 +2579,14 @@ static int d40_set_runtime_config(struct dma_chan *chan,
return -EINVAL;
}
+ if (src_maxburst > 16) {
+ src_maxburst = 16;
+ dst_maxburst = src_maxburst * src_addr_width / dst_addr_width;
+ } else if (dst_maxburst > 16) {
+ dst_maxburst = 16;
+ src_maxburst = dst_maxburst * dst_addr_width / src_addr_width;
+ }
+
ret = dma40_config_to_halfchannel(d40c, &cfg->src_info,
src_addr_width,
src_maxburst);
--
1.7.12.1
next prev parent reply other threads:[~2012-12-12 9:37 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-12 9:37 [PATCH 0/7] various ste_dma40 fixes Fabio Baltieri
2012-12-12 9:37 ` [PATCH 1/7] dmaengine: ste_dma40: reset priority bit for logical channels Fabio Baltieri
2012-12-12 9:37 ` [PATCH 2/7] dmaengine: ste_dma40: use writel_relaxed for lcxa Fabio Baltieri
2012-12-12 9:37 ` [PATCH 3/7] dmaengine: ste_dma40: set dma max seg size Fabio Baltieri
2012-12-12 9:37 ` Fabio Baltieri [this message]
2012-12-12 9:37 ` [PATCH 5/7] dmaengine: ste_dma40: don't check for pm_runtime_suspended() Fabio Baltieri
2012-12-12 9:37 ` [PATCH 6/7] dmaengine: ste_dma40: don't allow high priority dest event lines Fabio Baltieri
2012-12-12 9:37 ` [PATCH 7/7] dmaengine: ste_dma40: support fixed physical channel allocation Fabio Baltieri
2012-12-12 10:16 ` [PATCH 0/7] various ste_dma40 fixes Fabio Baltieri
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