dma_set_mask_and_coherent() is used by some Broadcom drivers.
Signed-off-by: Hauke Mehrtens <[email protected]
---
backport/backport-include/linux/dma-mapping.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/backport/backport-include/linux/dma-mapping.h
b/backport/backport-include/linux/dma-mapping.h
index eb786cf..6c4973a 100644
--- a/backport/backport-include/linux/dma-mapping.h
+++ b/backport/backport-include/linux/dma-mapping.h
@@ -90,4 +90,20 @@ static inline void dma_sync_single_range_for_device(struct
device *dev,
#endif /* arm */
#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0)
+/*
+ * Set both the DMA mask and the coherent DMA mask to the same thing.
+ * Note that we don't check the return value from dma_set_coherent_mask()
+ * as the DMA API guarantees that the coherent DMA mask can be set to
+ * the same or smaller than the streaming DMA mask.
+ */
+static inline int dma_set_mask_and_coherent(struct device *dev, u64 mask)
+{
+ int rc = dma_set_mask(dev, mask);
+ if (rc == 0)
+ dma_set_coherent_mask(dev, mask);
+ return rc;
+}
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0) */
+
#endif /* __BACKPORT_LINUX_DMA_MAPPING_H */
--
1.7.10.4
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