New drivers should use dma_request_chan() instead
dma_request_slave_channel()
dma_request_slave_channel() is a simple wrapper for dma_request_chan()
eating up the error code for channel request failure and makes deferred
probing impossible.
Move the dma_request_slave_channel() into the header as inline function,
mark it as deprecated.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
---
drivers/dma/dmaengine.c | 18 ------------------
include/linux/dmaengine.h | 15 +++++++++------
2 files changed, 9 insertions(+), 24 deletions(-)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 121231300d35..8ec2257a8d88 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -781,24 +781,6 @@ struct dma_chan *dma_request_chan(struct device *dev, const char *name)
}
EXPORT_SYMBOL_GPL(dma_request_chan);
-/**
- * dma_request_slave_channel - try to allocate an exclusive slave channel
- * @dev: pointer to client device structure
- * @name: slave channel name
- *
- * Returns pointer to appropriate DMA channel on success or NULL.
- */
-struct dma_chan *dma_request_slave_channel(struct device *dev,
- const char *name)
-{
- struct dma_chan *ch = dma_request_chan(dev, name);
- if (IS_ERR(ch))
- return NULL;
-
- return ch;
-}
-EXPORT_SYMBOL_GPL(dma_request_slave_channel);
-
/**
* dma_request_chan_by_mask - allocate a channel satisfying certain capabilities
* @mask: capabilities that the channel must satisfy
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 6702df107d79..4c522bf6ac25 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -1440,7 +1440,6 @@ void dma_issue_pending_all(void);
struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask,
dma_filter_fn fn, void *fn_param,
struct device_node *np);
-struct dma_chan *dma_request_slave_channel(struct device *dev, const char *name);
struct dma_chan *dma_request_chan(struct device *dev, const char *name);
struct dma_chan *dma_request_chan_by_mask(const dma_cap_mask_t *mask);
@@ -1470,11 +1469,6 @@ static inline struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask,
{
return NULL;
}
-static inline struct dma_chan *dma_request_slave_channel(struct device *dev,
- const char *name)
-{
- return NULL;
-}
static inline struct dma_chan *dma_request_chan(struct device *dev,
const char *name)
{
@@ -1544,6 +1538,15 @@ void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
#define dma_request_channel(mask, x, y) \
__dma_request_channel(&(mask), x, y, NULL)
+/* Deprecated, please use dma_request_chan() directly */
+static inline struct dma_chan * __deprecated
+dma_request_slave_channel(struct device *dev, const char *name)
+{
+ struct dma_chan *ch = dma_request_chan(dev, name);
+
+ return IS_ERR(ch) ? NULL : ch;
+}
+
static inline struct dma_chan
*dma_request_slave_channel_compat(const dma_cap_mask_t mask,
dma_filter_fn fn, void *fn_param,
--
Peter
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
