Hi Linus, please pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx.git fixes
...to receive:
A fix for a locking bug in the mv_xor driver, also tagged for -stable.
A compile fix for drivers sitting in -next.
--
Dan
Guennadi Liakhovetski (1):
dmaengine: provide dummy functions for DMA_ENGINE=n
Saeed Bishara (1):
mv_xor: fix race in tasklet function
drivers/dma/mv_xor.c | 2 +-
include/linux/dmaengine.h | 13 ++++++++++---
2 files changed, 11 insertions(+), 4 deletions(-)
commit 8f33d5277fada0291ea495f7fd44a3e7b7aa41d3
Author: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Date: Wed Dec 22 14:46:46 2010 +0100
dmaengine: provide dummy functions for DMA_ENGINE=n
This lets drivers, optionally using the dmaengine, build with DMA_ENGINE
unselected.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 9d8688b..8cd00ad 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -824,6 +824,8 @@ enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie);
#ifdef CONFIG_DMA_ENGINE
enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx);
void dma_issue_pending_all(void);
+struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param);
+void dma_release_channel(struct dma_chan *chan);
#else
static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx)
{
@@ -831,7 +833,14 @@ static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descript
}
static inline void dma_issue_pending_all(void)
{
- do { } while (0);
+}
+static inline struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask,
+ dma_filter_fn fn, void *fn_param)
+{
+ return NULL;
+}
+static inline void dma_release_channel(struct dma_chan *chan)
+{
}
#endif
@@ -842,8 +851,6 @@ void dma_async_device_unregister(struct dma_device *device);
void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type);
#define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y)
-struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param);
-void dma_release_channel(struct dma_chan *chan);
/* --- Helper iov-locking functions --- */
commit 8333f65ef094e47020cd01452b4637e7daf5a77f
Author: Saeed Bishara <saeed@xxxxxxxxxxx>
Date: Tue Dec 21 16:53:39 2010 +0200
mv_xor: fix race in tasklet function
use mv_xor_slot_cleanup() instead of __mv_xor_slot_cleanup() as the former function
aquires the spin lock that needed to protect the drivers data.
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Saeed Bishara <saeed@xxxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 411d5bf..a25f5f6 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -449,7 +449,7 @@ mv_xor_slot_cleanup(struct mv_xor_chan *mv_chan)
static void mv_xor_tasklet(unsigned long data)
{
struct mv_xor_chan *chan = (struct mv_xor_chan *) data;
- __mv_xor_slot_cleanup(chan);
+ mv_xor_slot_cleanup(chan);
}
static struct mv_xor_desc_slot *
--
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