i2c: fix i2c-sh_mobile rx underrun

Fix receive path underrun in i2c-sh_mobile driver. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
mariux64 · Nov 13, 2008 · bff4056 · bff4056
1 parent 185aed7
commit bff4056
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -318,7 +318,8 @@ static int sh_mobile_i2c_isr_rx(struct sh_mobile_i2c_data *pd)
 		} else
 			data = i2c_op(pd, OP_RX, 0);
 
-		pd->msg->buf[real_pos] = data;
+		if (real_pos >= 0)
+			pd->msg->buf[real_pos] = data;
 	} while (0);
 
 	pd->pos++;