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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: Jon Mason <jon.mason@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Jon Mason 2013-09-09 16:51:59 -07:00 committed by Dan Williams
parent ab5f8c6ee8
commit 4a43f394a0
1 changed files with 10 additions and 2 deletions
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12
include/linux/dmaengine.h
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@ -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);
#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,
@ -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);
#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;
@ -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) \