[PATCH -next v2 1/2] i2c: mt7621: fix missing clk_disable_unprepare() on error in mtk_i2c_probe()

[PATCH -next v2 1/2] i2c: mt7621: fix missing clk_disable_unprepare() on error in mtk_i2c_probe()

[Yang Yingliang]

Fix the missing clk_disable_unprepare() before return
from mtk_i2c_probe() in the error handling case.

Fixes: d04913ec5f89 ("i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
   v2: add return 0 in normal path.
---
 drivers/i2c/busses/i2c-mt7621.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt7621.c b/drivers/i2c/busses/i2c-mt7621.c
index 45fe4a7fe0c0..901f0fb04fee 100644
--- a/drivers/i2c/busses/i2c-mt7621.c
+++ b/drivers/i2c/busses/i2c-mt7621.c
@@ -304,7 +304,8 @@ static int mtk_i2c_probe(struct platform_device *pdev)
 
 	if (i2c->bus_freq == 0) {
 		dev_warn(i2c->dev, "clock-frequency 0 not supported\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_disable_clk;
 	}
 
 	adap = &i2c->adap;
@@ -322,10 +323,15 @@ static int mtk_i2c_probe(struct platform_device *pdev)
 
 	ret = i2c_add_adapter(adap);
 	if (ret < 0)
-		return ret;
+		goto err_disable_clk;
 
 	dev_info(&pdev->dev, "clock %u kHz\n", i2c->bus_freq / 1000);
 
+	return 0;
+
+err_disable_clk:
+	clk_disable_unprepare(i2c->clk);
+
 	return ret;
 }
 
-- 
2.25.1

[PATCH -next v2 2/2] i2c: mt7621: Use devm_platform_get_and_ioremap_resource()

[Yang Yingliang]

Use devm_platform_get_and_ioremap_resource() to simplify
code.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Stefan Roese <sr@denx.de>
---
 drivers/i2c/busses/i2c-mt7621.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt7621.c b/drivers/i2c/busses/i2c-mt7621.c
index 901f0fb04fee..cfe6de8175dd 100644
--- a/drivers/i2c/busses/i2c-mt7621.c
+++ b/drivers/i2c/busses/i2c-mt7621.c
@@ -270,18 +270,15 @@ static void mtk_i2c_init(struct mtk_i2c *i2c)
 
 static int mtk_i2c_probe(struct platform_device *pdev)
 {
-	struct resource *res;
 	struct mtk_i2c *i2c;
 	struct i2c_adapter *adap;
 	int ret;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
 	i2c = devm_kzalloc(&pdev->dev, sizeof(struct mtk_i2c), GFP_KERNEL);
 	if (!i2c)
 		return -ENOMEM;
 
-	i2c->base = devm_ioremap_resource(&pdev->dev, res);
+	i2c->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
 	if (IS_ERR(i2c->base))
 		return PTR_ERR(i2c->base);
 
-- 
2.25.1

Re: [PATCH -next v2 2/2] i2c: mt7621: Use devm_platform_get_and_ioremap_resource()

[Wolfram Sang]

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On Sat, May 14, 2022 at 10:31:48AM +0800, Yang Yingliang wrote:
> Use devm_platform_get_and_ioremap_resource() to simplify
> code.
> 
> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
> Reviewed-by: Stefan Roese <sr@denx.de>

Applied to for-next, thanks!


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Re: [PATCH -next v2 1/2] i2c: mt7621: fix missing clk_disable_unprepare() on error in mtk_i2c_probe()

[Stefan Roese]

On 14.05.22 04:31, Yang Yingliang wrote:
> Fix the missing clk_disable_unprepare() before return
> from mtk_i2c_probe() in the error handling case.
> 
> Fixes: d04913ec5f89 ("i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driver")
> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

Reviewed-by: Stefan Roese <sr@denx.de>

Thanks,
Stefan

> ---
>     v2: add return 0 in normal path.
> ---
>   drivers/i2c/busses/i2c-mt7621.c | 10 ++++++++--
>   1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-mt7621.c b/drivers/i2c/busses/i2c-mt7621.c
> index 45fe4a7fe0c0..901f0fb04fee 100644
> --- a/drivers/i2c/busses/i2c-mt7621.c
> +++ b/drivers/i2c/busses/i2c-mt7621.c
> @@ -304,7 +304,8 @@ static int mtk_i2c_probe(struct platform_device *pdev)
>   
>   	if (i2c->bus_freq == 0) {
>   		dev_warn(i2c->dev, "clock-frequency 0 not supported\n");
> -		return -EINVAL;
> +		ret = -EINVAL;
> +		goto err_disable_clk;
>   	}
>   
>   	adap = &i2c->adap;
> @@ -322,10 +323,15 @@ static int mtk_i2c_probe(struct platform_device *pdev)
>   
>   	ret = i2c_add_adapter(adap);
>   	if (ret < 0)
> -		return ret;
> +		goto err_disable_clk;
>   
>   	dev_info(&pdev->dev, "clock %u kHz\n", i2c->bus_freq / 1000);
>   
> +	return 0;
> +
> +err_disable_clk:
> +	clk_disable_unprepare(i2c->clk);
> +
>   	return ret;
>   }
>   

Viele Grüße,
Stefan Roese

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DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
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Re: [PATCH -next v2 1/2] i2c: mt7621: fix missing clk_disable_unprepare() on error in mtk_i2c_probe()

[Wolfram Sang]

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On Sat, May 14, 2022 at 10:31:47AM +0800, Yang Yingliang wrote:
> Fix the missing clk_disable_unprepare() before return
> from mtk_i2c_probe() in the error handling case.
> 
> Fixes: d04913ec5f89 ("i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driver")
> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

Applied to for-current, thanks!


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