From 9f9ff20d46c6728b092f34b6a642e1e81ab5e254 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <error27@gmail.com>
Date: Sat, 14 Aug 2010 11:01:45 +0200
Subject: dma/shdma: move dereference below the NULL check

"param" can be NULL here, so only dereference it after the check.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index fb64cf3..eb6b54d 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -580,7 +580,6 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
 
 	sh_chan = to_sh_chan(chan);
 	param = chan->private;
-	slave_addr = param->config->addr;
 
 	/* Someone calling slave DMA on a public channel? */
 	if (!param || !sg_len) {
@@ -589,6 +588,8 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
 		return NULL;
 	}
 
+	slave_addr = param->config->addr;
+
 	/*
 	 * if (param != NULL), this is a successfully requested slave channel,
 	 * therefore param->config != NULL too.
-- 
cgit v0.10.2


From d3f3cf859db17cc5f8156c5bfcd032413e44483b Mon Sep 17 00:00:00 2001
From: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
Date: Sat, 14 Aug 2010 15:02:44 +0200
Subject: missing inline keyword for static function in linux/dmaengine.h

Add a missing inline keyword for static function in linux/dmaengine.h to
avoid duplicate symbol definitions.

Signed-off-by: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index c61d4ca..e210649 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -548,7 +548,7 @@ static inline bool dma_dev_has_pq_continue(struct dma_device *dma)
 	return (dma->max_pq & DMA_HAS_PQ_CONTINUE) == DMA_HAS_PQ_CONTINUE;
 }
 
-static unsigned short dma_dev_to_maxpq(struct dma_device *dma)
+static inline unsigned short dma_dev_to_maxpq(struct dma_device *dma)
 {
 	return dma->max_pq & ~DMA_HAS_PQ_CONTINUE;
 }
-- 
cgit v0.10.2


From cc60f8878eab892c03d06b10f389232b9b66bd83 Mon Sep 17 00:00:00 2001
From: Simon Guinot <sguinot@lacie.com>
Date: Fri, 17 Sep 2010 23:33:51 +0200
Subject: dmaengine: fix interrupt clearing for mv_xor

When using simultaneously the two DMA channels on a same engine, some
transfers are never completed. For example, an endless lock can occur
while writing heavily on a RAID5 array (with async-tx offload support
enabled).

Note that this issue can also be reproduced by using the DMA test
client.

On a same engine, the interrupt cause register is shared between two
DMA channels. This patch make sure that the cause bit is only cleared
for the requested channel.

Signed-off-by: Simon Guinot <sguinot@lacie.com>
Tested-by: Luc Saillard <luc@saillard.org>
Acked-by: saeed bishara <saeed.bishara@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 86c5ae9..411d5bf 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -162,7 +162,7 @@ static int mv_is_err_intr(u32 intr_cause)
 
 static void mv_xor_device_clear_eoc_cause(struct mv_xor_chan *chan)
 {
-	u32 val = (1 << (1 + (chan->idx * 16)));
+	u32 val = ~(1 << (chan->idx * 16));
 	dev_dbg(chan->device->common.dev, "%s, val 0x%08x\n", __func__, val);
 	__raw_writel(val, XOR_INTR_CAUSE(chan));
 }
-- 
cgit v0.10.2