dma: sirf: use NULL instead of 0
sirfsoc_dma_prep_cyclic() returns pointer, thus NULL should be used instead of 0 in order to fix the following sparse warning: drivers/dma/sirf-dma.c:598:24: warning: Using plain integer as NULL pointer Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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@ -595,7 +595,7 @@ sirfsoc_dma_prep_cyclic(struct dma_chan *chan, dma_addr_t addr,
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spin_unlock_irqrestore(&schan->lock, iflags);
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if (!sdesc)
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return 0;
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return NULL;
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/* Place descriptor in prepared list */
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spin_lock_irqsave(&schan->lock, iflags);
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