[media] m5mols: Remove mode_save field from struct m5mols_info

There is no need to keep this in the drivers' private data structure,
an on the stack variable is enough. Also simplify a bit the ISP state
switching function.
Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/m5mols/m5mols.h

@@ -180,7 +180,6 @@ struct m5mols_version {
  * @lock_awb: true means the Aut WhiteBalance is locked
  * @resolution:	register value for current resolution
  * @mode: register value for current operation mode
- * @mode_save: register value for current operation mode for saving
  * @set_power: optional power callback to the board code
  */
 struct m5mols_info {
@@ -211,7 +210,6 @@ struct m5mols_info {
 	bool lock_awb;
 	u8 resolution;
 	u8 mode;
-	u8 mode_save;
 	int (*set_power)(struct device *dev, int on);
 };
 

drivers/media/video/m5mols/m5mols_core.c

@@ -370,13 +370,13 @@ int m5mols_mode(struct m5mols_info *info, u8 mode)
 		return ret;
 
 	ret = m5mols_read_u8(sd, SYSTEM_SYSMODE, &reg);
-	if ((!ret && reg == mode) || ret)
+	if (ret || reg == mode)
 		return ret;
 
 	switch (reg) {
 	case REG_PARAMETER:
 		ret = m5mols_reg_mode(sd, REG_MONITOR);
-		if (!ret && mode == REG_MONITOR)
+		if (mode == REG_MONITOR)
 			break;
 		if (!ret)
 			ret = m5mols_reg_mode(sd, REG_CAPTURE);
@@ -393,7 +393,7 @@ int m5mols_mode(struct m5mols_info *info, u8 mode)
 
 	case REG_CAPTURE:
 		ret = m5mols_reg_mode(sd, REG_MONITOR);
-		if (!ret && mode == REG_MONITOR)
+		if (mode == REG_MONITOR)
 			break;
 		if (!ret)
 			ret = m5mols_reg_mode(sd, REG_PARAMETER);
@@ -677,15 +677,14 @@ static int m5mols_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct v4l2_subdev *sd = to_sd(ctrl);
 	struct m5mols_info *info = to_m5mols(sd);
-	int ret;
-
-	info->mode_save = info->mode;
+	int isp_state = info->mode;
+	int ret = 0;
 
 	ret = m5mols_mode(info, REG_PARAMETER);
 	if (!ret)
 		ret = m5mols_set_ctrl(ctrl);
 	if (!ret)
-		ret = m5mols_mode(info, info->mode_save);
+		ret = m5mols_mode(info, isp_state);
 
 	return ret;
 }