From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Eric Long <eric.long@unisoc.com>,
Baolin Wang <baolin.wang@linaro.org>,
Vinod Koul <vkoul@kernel.org>, Sasha Levin <sashal@kernel.org>,
dmaengine@vger.kernel.org
Subject: [PATCH AUTOSEL 5.1 09/59] dmaengine: sprd: Fix block length overflow
Date: Fri, 14 Jun 2019 16:27:53 -0400 [thread overview]
Message-ID: <20190614202843.26941-9-sashal@kernel.org> (raw)
In-Reply-To: <20190614202843.26941-1-sashal@kernel.org>
From: Eric Long <eric.long@unisoc.com>
[ Upstream commit 89d03b3c126d683f7b2cd5b07178493993d12448 ]
The maximum value of block length is 0xffff, so if the configured transfer length
is more than 0xffff, that will cause block length overflow to lead a configuration
error.
Thus we can set block length as the maximum burst length to avoid this issue, since
the maximum burst length will not be a big value which is more than 0xffff.
Signed-off-by: Eric Long <eric.long@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/dma/sprd-dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 0f92e60529d1..a01c23246632 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -778,7 +778,7 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
temp |= slave_cfg->src_maxburst & SPRD_DMA_FRG_LEN_MASK;
hw->frg_len = temp;
- hw->blk_len = len & SPRD_DMA_BLK_LEN_MASK;
+ hw->blk_len = slave_cfg->src_maxburst & SPRD_DMA_BLK_LEN_MASK;
hw->trsc_len = len & SPRD_DMA_TRSC_LEN_MASK;
temp = (dst_step & SPRD_DMA_TRSF_STEP_MASK) << SPRD_DMA_DEST_TRSF_STEP_OFFSET;
--
2.20.1
next prev parent reply other threads:[~2019-06-14 20:39 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190614202843.26941-1-sashal@kernel.org>
2019-06-14 20:27 ` [PATCH AUTOSEL 5.1 03/59] dmaengine: jz4780: Fix transfers being ACKed too soon Sasha Levin
2019-06-14 20:27 ` [PATCH AUTOSEL 5.1 04/59] dmaengine: dw-axi-dmac: fix null dereference when pointer first is null Sasha Levin
2019-06-14 20:27 ` [PATCH AUTOSEL 5.1 05/59] dmaengine: mediatek-cqdma: sleeping in atomic context Sasha Levin
2019-06-14 20:27 ` [PATCH AUTOSEL 5.1 06/59] dmaengine: sprd: Fix the possible crash when getting descriptor status Sasha Levin
2019-06-14 20:27 ` [PATCH AUTOSEL 5.1 07/59] dmaengine: sprd: Add validation of current descriptor in irq handler Sasha Levin
2019-06-14 20:27 ` [PATCH AUTOSEL 5.1 08/59] dmaengine: sprd: Fix the incorrect start for 2-stage destination channels Sasha Levin
2019-06-14 20:27 ` Sasha Levin [this message]
2019-06-14 20:27 ` [PATCH AUTOSEL 5.1 10/59] dmaengine: sprd: Fix the right place to configure 2-stage transfer Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190614202843.26941-9-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=baolin.wang@linaro.org \
--cc=dmaengine@vger.kernel.org \
--cc=eric.long@unisoc.com \
--cc=linux-kernel@vger.kernel.org \
--cc=stable@vger.kernel.org \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).