i2c: ismt: initialize DMA buffer

This patch adds code to initialize the DMA buffer to compensate for possible hardware data corruption. Signed-off-by: James Ralston <[email protected]> [wsa: changed to use 'sizeof'] Signed-off-by: Wolfram Sang <[email protected]>
mrcsosa · Sep 28, 2013 · bf41691 · bf41691
1 parent bd63ace
commit bf41691
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c
@@ -393,6 +393,9 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr,
 
 	desc = &priv->hw[priv->head];
 
+	/* Initialize the DMA buffer */
+	memset(priv->dma_buffer, 0, sizeof(priv->dma_buffer));
+
 	/* Initialize the descriptor */
 	memset(desc, 0, sizeof(struct ismt_desc));
 	desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write);