diff options
Diffstat (limited to 'include/linux/dmaengine.h')
| -rw-r--r-- | include/linux/dmaengine.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 2601186ab183..0bc727534108 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -38,7 +38,10 @@ typedef s32 dma_cookie_t; #define DMA_MIN_COOKIE 1 #define DMA_MAX_COOKIE INT_MAX -#define dma_submit_error(cookie) ((cookie) < 0 ? 1 : 0) +static inline int dma_submit_error(dma_cookie_t cookie) +{ + return cookie < 0 ? cookie : 0; +} /** * enum dma_status - DMA transaction status @@ -994,8 +997,9 @@ dma_set_tx_state(struct dma_tx_state *st, dma_cookie_t last, dma_cookie_t used, } } -enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie); #ifdef CONFIG_DMA_ENGINE +struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type); +enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie); 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(const dma_cap_mask_t *mask, @@ -1003,6 +1007,14 @@ struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask, struct dma_chan *dma_request_slave_channel(struct device *dev, const char *name); void dma_release_channel(struct dma_chan *chan); #else +static inline struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type) +{ + return NULL; +} +static inline enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie) +{ + return DMA_SUCCESS; +} static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) { return DMA_SUCCESS; @@ -1030,7 +1042,6 @@ static inline void dma_release_channel(struct dma_chan *chan) int dma_async_device_register(struct dma_device *device); 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); struct dma_chan *dma_get_slave_channel(struct dma_chan *chan); struct dma_chan *net_dma_find_channel(void); #define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y) |