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

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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@xxxxxxxxxx>

Reviewed-by: Stefan Roese <sr@xxxxxxx>

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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HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr@xxxxxxx



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