UPSTREAM: dmaengine: core: Skip mask matching when it is not provided to private_cand...

[firefly-linux-kernel-4.4.55.git] / drivers / dma / dmaengine.c

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 6dbe777b04f5ce78746a259e7eb97e9bb4576440..002ed81c277b6e7db3c7c95f16248a9854a76c27 100644 (file)
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -515,7 +515,7 @@ static struct dma_chan *private_candidate(const dma_cap_mask_t *mask,
 {
        struct dma_chan *chan;
 
-       if (!__dma_device_satisfies_mask(dev, mask)) {
+       if (mask && !__dma_device_satisfies_mask(dev, mask)) {
                pr_debug("%s: wrong capabilities\n", __func__);
                return NULL;
        }