From: Leon Romanovsky <leonro@xxxxxxxxxx>
Allow callers to properly initialize the IOVA state struct by providing
a new function to do so. This will make sure that even users who doesn't
zero their allocated memory will have a valid IOVA state struct.
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
---
include/linux/dma-mapping.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index f693aafe221f..285075873077 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -76,6 +76,20 @@
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
+struct dma_iova_state {
+ struct device *dev;
+ enum dma_data_direction dir;
+};
+
+static inline void dma_init_iova_state(struct dma_iova_state *state,
+ struct device *dev,
+ enum dma_data_direction dir)
+{
+ memset(state, 0, sizeof(*state));
+ state->dev = dev;
+ state->dir = dir;
+}
+
#ifdef CONFIG_DMA_API_DEBUG
void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
void debug_dma_map_single(struct device *dev, const void *addr,
--
2.46.0
