[alsa-devel] [PATCH 23/51] DMA-API: dma: pl08x: add dma_set_mask_and_coherent() call

[Russell King]

The DMA API requires drivers to call the appropriate dma_set_mask()
functions before doing any DMA mapping.  Add this required call to
the AMBA PL08x driver.

Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
 drivers/dma/amba-pl08x.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index fce46c5..e51a983 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -2055,6 +2055,11 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
 	if (ret)
 		return ret;
 
+	/* Ensure that we can do DMA */
+	ret = dma_set_mask_and_coherent(&adev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		goto out_no_pl08x;
+
 	/* Create the driver state holder */
 	pl08x = kzalloc(sizeof(*pl08x), GFP_KERNEL);
 	if (!pl08x) {
-- 
1.7.4.4