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dmaengine: shdma: fix a build failure on platforms with no DMA support

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On platforms with no support for the shdma dmaengine driver build is
currently failing with

drivers/built-in.o: In function `sh_mobile_sdhi_probe':
drivers/mmc/host/sh_mobile_sdhi.c:170: undefined reference to`shdma_chan_filter'

Fix the breakage by defining shdma_chan_filter to NULL in such
configurations.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
[horms+renesas@verge.net.au: Apply change to shdma-base.h instead of sh_dma.h]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Guennadi Liakhovetski 2013-07-10 11:09:12 +09:00 committed by Olof Johansson
parent c9250073cd
commit ab116a4df4
1 changed files with 4 additions and 0 deletions
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4
include/linux/shdma-base.h
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@ -124,6 +124,10 @@ void shdma_chan_remove(struct shdma_chan *schan);
int shdma_init(struct device *dev, struct shdma_dev *sdev,
int chan_num);
void shdma_cleanup(struct shdma_dev *sdev);
#if IS_ENABLED(CONFIG_SH_DMAE_BASE)
bool shdma_chan_filter(struct dma_chan *chan, void *arg);
#else
#define shdma_chan_filter NULL
#endif
#endif