From: Evgeny Novikov <novikov@ispras.ru>
Date: Mon, 17 May 2021 12:49:18 +0000 (+0200)
Subject: media: v4l: cadence: Handle errors of clk_prepare_enable()
X-Git-Tag: accepted/tizen/unified/20230118.172025~6722^2~164
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e6001f6922cfda7b76f594595ebb38351c313da2;p=platform%2Fkernel%2Flinux-rpi.git

media: v4l: cadence: Handle errors of clk_prepare_enable()

Handle errors of clk_prepare_enable() in csi2tx_get_resources().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---

diff --git a/drivers/media/platform/cadence/cdns-csi2tx.c b/drivers/media/platform/cadence/cdns-csi2tx.c
index e4d08ac..765ae40 100644
--- a/drivers/media/platform/cadence/cdns-csi2tx.c
+++ b/drivers/media/platform/cadence/cdns-csi2tx.c
@@ -436,6 +436,7 @@ static int csi2tx_get_resources(struct csi2tx_priv *csi2tx,
 	struct resource *res;
 	unsigned int i;
 	u32 dev_cfg;
+	int ret;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	csi2tx->base = devm_ioremap_resource(&pdev->dev, res);
@@ -454,7 +455,12 @@ static int csi2tx_get_resources(struct csi2tx_priv *csi2tx,
 		return PTR_ERR(csi2tx->esc_clk);
 	}
 
-	clk_prepare_enable(csi2tx->p_clk);
+	ret = clk_prepare_enable(csi2tx->p_clk);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't prepare and enable p_clk\n");
+		return ret;
+	}
+
 	dev_cfg = readl(csi2tx->base + CSI2TX_DEVICE_CONFIG_REG);
 	clk_disable_unprepare(csi2tx->p_clk);