Commit 4a43f394 authored by Jon Mason's avatar Jon Mason Committed by Dan Williams

dmaengine: dma_sync_wait and dma_find_channel undefined

dma_sync_wait and dma_find_channel are declared regardless of whether
CONFIG_DMA_ENGINE is enabled, but calling the function without
CONFIG_DMA_ENGINE enabled results "undefined reference" errors.

To get around this, declare dma_sync_wait and dma_find_channel as inline
functions if CONFIG_DMA_ENGINE is undefined.
Signed-off-by: default avatarJon Mason <>
Signed-off-by: default avatarDan Williams <>
parent ab5f8c6e
......@@ -961,8 +961,9 @@ 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);
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,
......@@ -970,6 +971,14 @@ 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);
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)
static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx)
......@@ -997,7 +1006,6 @@ 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 *net_dma_find_channel(void);
#define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y)
#define dma_request_slave_channel_compat(mask, x, y, dev, name) \
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