linux-kernel - [PATCH 8/9] media: stm32: csi: correct unsigned or useless variable settings

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Message-ID: <20241217-csi_dcmipp_mp25_enhancements-v1-8-2b432805d17d@foss.st.com>
Date: Tue, 17 Dec 2024 18:39:25 +0100
From: Alain Volmat <alain.volmat@...s.st.com>
To: Hugues Fruchet <hugues.fruchet@...s.st.com>,
        Mauro Carvalho Chehab
	<mchehab@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre
 Torgue <alexandre.torgue@...s.st.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: <linux-media@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Alain Volmat <alain.volmat@...s.st.com>
Subject: [PATCH 8/9] media: stm32: csi: correct unsigned or useless
 variable settings

Correct several missing unsigned type missing for loop variables
and also remove useless initialization of variables.

Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 1be12c9dcf55..602b0879f21e 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -357,7 +357,7 @@ static inline struct stm32_csi_dev *to_csidev(struct v4l2_subdev *sd)
 static int stm32_csi_setup_lane_merger(struct stm32_csi_dev *csidev)
 {
 	u32 lmcfgr = 0;
-	int i;
+	unsigned int i;
 
 	for (i = 0; i < csidev->num_lanes; i++) {
 		if (!csidev->lanes[i] || csidev->lanes[i] > STM32_CSI_LANES_MAX) {
@@ -595,20 +595,20 @@ static int stm32_csi_start_vc(struct stm32_csi_dev *csidev,
 {
 	struct v4l2_mbus_framefmt *mbus_fmt;
 	const struct stm32_csi_fmts *fmt;
-	u32 cfgr1 = 0;
-	int ret = 0;
 	u32 status;
+	u32 cfgr1;
+	int ret;
 
 	mbus_fmt = v4l2_subdev_state_get_format(state, STM32_CSI_PAD_SOURCE);
 	fmt = stm32_csi_code_to_fmt(mbus_fmt->code);
 
 	/* If the mbus code is JPEG, don't enable filtering */
 	if (mbus_fmt->code == MEDIA_BUS_FMT_JPEG_1X8) {
-		cfgr1 |= STM32_CSI_VCXCFGR1_ALLDT;
+		cfgr1 = STM32_CSI_VCXCFGR1_ALLDT;
 		cfgr1 |= fmt->input_fmt << STM32_CSI_VCXCFGR1_CDTFT_SHIFT;
 		dev_dbg(csidev->dev, "VC%d: enable AllDT mode\n", vc);
 	} else {
-		cfgr1 |= fmt->datatype << STM32_CSI_VCXCFGR1_DT0_SHIFT;
+		cfgr1 = fmt->datatype << STM32_CSI_VCXCFGR1_DT0_SHIFT;
 		cfgr1 |= fmt->input_fmt << STM32_CSI_VCXCFGR1_DT0FT_SHIFT;
 		cfgr1 |= STM32_CSI_VCXCFGR1_DT0EN;
 		dev_dbg(csidev->dev, "VC%d: enable DT0(0x%x)/DT0FT(0x%x)\n",
@@ -634,8 +634,8 @@ static int stm32_csi_start_vc(struct stm32_csi_dev *csidev,
 
 static int stm32_csi_stop_vc(struct stm32_csi_dev *csidev, u32 vc)
 {
-	int ret = 0;
 	u32 status;
+	int ret;
 
 	/* Stop the Virtual Channel */
 	writel_relaxed(STM32_CSI_CR_VCXSTOP(vc) | STM32_CSI_CR_CSIEN,
@@ -714,7 +714,7 @@ static int stm32_csi_enable_streams(struct v4l2_subdev *sd,
 static int stm32_csi_init_state(struct v4l2_subdev *sd,
 				struct v4l2_subdev_state *state)
 {
-	int i;
+	unsigned int i;
 
 	for (i = 0; i < sd->entity.num_pads; i++)
 		*v4l2_subdev_state_get_format(state, i) = fmt_default;
@@ -879,7 +879,8 @@ static irqreturn_t stm32_csi_irq_thread(int irq, void *arg)
 static int stm32_csi_get_resources(struct stm32_csi_dev *csidev,
 				   struct platform_device *pdev)
 {
-	int irq, ret, i;
+	unsigned int i;
+	int irq, ret;
 
 	csidev->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
 	if (IS_ERR(csidev->base))

-- 
2.34.1