V4L/DVB (8686): mt9m111: style cleanup

Fix a typo in Kconfig, simplify error checking, further minor cleanup.
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Guennadi Liakhovetski <g.iakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig

@@ -810,7 +810,7 @@ config MT9M001_PCA9536_SWITCH
 	  extender to switch between 8 and 10 bit datawidth modes
 
 config SOC_CAMERA_MT9M111
-	tristate "mt9m001 support"
+	tristate "mt9m111 support"
 	depends on SOC_CAMERA && I2C
 	help
 	  This driver supports MT9M111 cameras from Micron

drivers/media/video/mt9m111.c

@@ -173,7 +173,7 @@ static int reg_page_map_set(struct i2c_client *client, const u16 reg)
 		return -EINVAL;
 
 	ret = i2c_smbus_write_word_data(client, MT9M111_PAGE_MAP, swab16(page));
-	if (ret >= 0)
+	if (!ret)
 		lastpage = page;
 	return ret;
 }
@@ -200,7 +200,7 @@ static int mt9m111_reg_write(struct soc_camera_device *icd, const u16 reg,
 	int ret;
 
 	ret = reg_page_map_set(client, reg);
-	if (ret >= 0)
+	if (!ret)
 		ret = i2c_smbus_write_word_data(mt9m111->client, (reg & 0xff),
 						swab16(data));
 	dev_dbg(&icd->dev, "write reg.%03x = %04x -> %d\n", reg, data, ret);
@@ -246,7 +246,7 @@ static int mt9m111_set_context(struct soc_camera_device *icd,
 static int mt9m111_setup_rect(struct soc_camera_device *icd)
 {
 	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
-	int ret = 0, is_raw_format;
+	int ret, is_raw_format;
 	int width = mt9m111->width;
 	int height = mt9m111->height;
 
@@ -256,32 +256,31 @@ static int mt9m111_setup_rect(struct soc_camera_device *icd)
 	else
 		is_raw_format = 0;
 
-	if (ret >= 0)
-		ret = reg_write(COLUMN_START, mt9m111->left);
-	if (ret >= 0)
+	ret = reg_write(COLUMN_START, mt9m111->left);
+	if (!ret)
 		ret = reg_write(ROW_START, mt9m111->top);
 
 	if (is_raw_format) {
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(WINDOW_WIDTH, width);
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(WINDOW_HEIGHT, height);
 	} else {
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(REDUCER_XZOOM_B, MT9M111_MAX_WIDTH);
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(REDUCER_YZOOM_B, MT9M111_MAX_HEIGHT);
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(REDUCER_XSIZE_B, width);
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(REDUCER_YSIZE_B, height);
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(REDUCER_XZOOM_A, MT9M111_MAX_WIDTH);
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(REDUCER_YZOOM_A, MT9M111_MAX_HEIGHT);
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(REDUCER_XSIZE_A, width);
-		if (ret >= 0)
+		if (!ret)
 			ret = reg_write(REDUCER_YSIZE_A, height);
 	}
 
@@ -293,7 +292,7 @@ static int mt9m111_setup_pixfmt(struct soc_camera_device *icd, u16 outfmt)
 	int ret;
 
 	ret = reg_write(OUTPUT_FORMAT_CTRL2_A, outfmt);
-	if (ret >= 0)
+	if (!ret)
 		ret = reg_write(OUTPUT_FORMAT_CTRL2_B, outfmt);
 	return ret;
 }
@@ -305,7 +304,6 @@ static int mt9m111_setfmt_bayer8(struct soc_camera_device *icd)
 
 static int mt9m111_setfmt_bayer10(struct soc_camera_device *icd)
 {
-
 	return mt9m111_setup_pixfmt(icd, MT9M111_OUTFMT_BYPASS_IFP);
 }
 
@@ -356,7 +354,7 @@ static int mt9m111_enable(struct soc_camera_device *icd)
 	int ret;
 
 	ret = reg_set(RESET, MT9M111_RESET_CHIP_ENABLE);
-	if (ret >= 0)
+	if (!ret)
 		mt9m111->powered = 1;
 	return ret;
 }
@@ -367,7 +365,7 @@ static int mt9m111_disable(struct soc_camera_device *icd)
 	int ret;
 
 	ret = reg_clear(RESET, MT9M111_RESET_CHIP_ENABLE);
-	if (ret >= 0)
+	if (!ret)
 		mt9m111->powered = 0;
 	return ret;
 }
@@ -377,9 +375,9 @@ static int mt9m111_reset(struct soc_camera_device *icd)
 	int ret;
 
 	ret = reg_set(RESET, MT9M111_RESET_RESET_MODE);
-	if (ret >= 0)
+	if (!ret)
 		ret = reg_set(RESET, MT9M111_RESET_RESET_SOC);
-	if (ret >= 0)
+	if (!ret)
 		ret = reg_clear(RESET, MT9M111_RESET_RESET_MODE
 				| MT9M111_RESET_RESET_SOC);
 	return ret;
@@ -410,7 +408,7 @@ static int mt9m111_set_bus_param(struct soc_camera_device *icd, unsigned long f)
 static int mt9m111_set_pixfmt(struct soc_camera_device *icd, u32 pixfmt)
 {
 	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
-	int ret = 0;
+	int ret;
 
 	switch (pixfmt) {
 	case V4L2_PIX_FMT_SBGGR8:
@@ -433,7 +431,7 @@ static int mt9m111_set_pixfmt(struct soc_camera_device *icd, u32 pixfmt)
 		ret = -EINVAL;
 	}
 
-	if (ret >= 0)
+	if (!ret)
 		mt9m111->pixfmt = pixfmt;
 
 	return ret;
@@ -443,7 +441,7 @@ static int mt9m111_set_fmt_cap(struct soc_camera_device *icd,
 			       __u32 pixfmt, struct v4l2_rect *rect)
 {
 	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
-	int ret = 0;
+	int ret;
 
 	mt9m111->left = rect->left;
 	mt9m111->top = rect->top;
@@ -455,9 +453,9 @@ static int mt9m111_set_fmt_cap(struct soc_camera_device *icd,
 		mt9m111->height);
 
 	ret = mt9m111_setup_rect(icd);
-	if (ret >= 0)
+	if (!ret)
 		ret = mt9m111_set_pixfmt(icd, pixfmt);
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 static int mt9m111_try_fmt_cap(struct soc_camera_device *icd,
@@ -644,7 +642,7 @@ static int mt9m111_set_global_gain(struct soc_camera_device *icd, int gain)
 	if ((gain >= 64 * 2) && (gain < 63 * 2 * 2))
 		val = (1 << 10) | (1 << 9) | (gain / 4);
 	else if ((gain >= 64) && (gain < 64 * 2))
-		val = (1<<9) | (gain / 2);
+		val = (1 << 9) | (gain / 2);
 	else
 		val = gain;
 
@@ -661,7 +659,7 @@ static int mt9m111_set_autoexposure(struct soc_camera_device *icd, int on)
 	else
 		ret = reg_clear(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);
 
-	if (ret >= 0)
+	if (!ret)
 		mt9m111->autoexposure = on;
 
 	return ret;
@@ -711,7 +709,7 @@ static int mt9m111_set_control(struct soc_camera_device *icd,
 {
 	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
 	const struct v4l2_queryctrl *qctrl;
-	int ret = 0;
+	int ret;
 
 	qctrl = soc_camera_find_qctrl(&mt9m111_ops, ctrl->id);
 
@@ -739,7 +737,7 @@ static int mt9m111_set_control(struct soc_camera_device *icd,
 		ret = -EINVAL;
 	}
 
-	return ret < 0 ? -EIO : 0;
+	return ret;
 }
 
 int mt9m111_restore_state(struct soc_camera_device *icd)
@@ -763,10 +761,10 @@ static int mt9m111_resume(struct soc_camera_device *icd)
 
 	if (mt9m111->powered) {
 		ret = mt9m111_enable(icd);
-		if (ret >= 0)
-			mt9m111_reset(icd);
-		if (ret >= 0)
-			mt9m111_restore_state(icd);
+		if (!ret)
+			ret = mt9m111_reset(icd);
+		if (!ret)
+			ret = mt9m111_restore_state(icd);
 	}
 	return ret;
 }
@@ -778,15 +776,15 @@ static int mt9m111_init(struct soc_camera_device *icd)
 
 	mt9m111->context = HIGHPOWER;
 	ret = mt9m111_enable(icd);
-	if (ret >= 0)
-		mt9m111_reset(icd);
-	if (ret >= 0)
-		mt9m111_set_context(icd, mt9m111->context);
-	if (ret >= 0)
-		mt9m111_set_autoexposure(icd, mt9m111->autoexposure);
-	if (ret < 0)
+	if (!ret)
+		ret = mt9m111_reset(icd);
+	if (!ret)
+		ret = mt9m111_set_context(icd, mt9m111->context);
+	if (!ret)
+		ret = mt9m111_set_autoexposure(icd, mt9m111->autoexposure);
+	if (ret)
 		dev_err(&icd->dev, "mt9m111 init failed: %d\n", ret);
-	return ret ? -EIO : 0;
+	return ret;
 }
 
 static int mt9m111_release(struct soc_camera_device *icd)
@@ -797,7 +795,7 @@ static int mt9m111_release(struct soc_camera_device *icd)
 	if (ret < 0)
 		dev_err(&icd->dev, "mt9m111 release failed: %d\n", ret);
 
-	return ret ? -EIO : 0;
+	return ret;
 }
 
 /*