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[RFC 1/6] dmaengine: core: Allow NULL mask pointer in __dma_device_satisfies_mask()

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  [RFC 1/6] dmaengine: core: Allow NULL mask pointer in __dma_device_satisfies_mask() Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-11-27 09:40 +0100

#1278612 — [RFC 1/6] dmaengine: core: Allow NULL mask pointer in __dma_device_satisfies_mask()

Treat as true condition the case when the mask is NULL.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 drivers/dma/dmaengine.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index daf54a39bcc7..52c3eee48e2e 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -184,6 +184,9 @@ __dma_device_satisfies_mask(struct dma_device *device,
 {
 	dma_cap_mask_t has;
 
+	if (!want)
+		return true;
+
 	bitmap_and(has.bits, want->bits, device->cap_mask.bits,
 		DMA_TX_TYPE_END);
 	return bitmap_equal(want->bits, has.bits, DMA_TX_TYPE_END);
-- 
2.6.3

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