From 4a43f394a08214eaf92cdd8ce3eae75e555323d8 Mon Sep 17 00:00:00 2001 From: Jon Mason Date: Mon, 9 Sep 2013 16:51:59 -0700 Subject: [PATCH] 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 Signed-off-by: Dan Williams --- include/linux/dmaengine.h | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index b3ba7e410943..0c72b89a172c 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -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) \ -- 2.20.1