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* [PATCH -next] i2c: imx-lpi2c: fix PM reference leak in lpi2c_imx_master_enable()
@ 2021-04-08 11:19 Ye Weihua
  2021-04-14  7:56 ` Wolfram Sang
  0 siblings, 1 reply; 2+ messages in thread
From: Ye Weihua @ 2021-04-08 11:19 UTC (permalink / raw)
  To: aisheng.dong, shawnguo, s.hauer, kernel, festevam, linux-imx
  Cc: linux-i2c, linux-arm-kernel, linux-kernel, yangjihong1, zhangjinhao2

The PM reference count is not expected to be incremented on return in
ipi2c_imx_master_enable().

However, pm_runtime_get_sync() will increment the PM reference count
even on failure. forgetting to put the reference again will result in
a leak.

Replace it with pm_runtime_resume_and_get() to keep the usage counter
balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ye Weihua <yeweihua4@huawei.com>
---
 drivers/i2c/busses/i2c-imx-lpi2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 9db6ccded5e9..8b9ba055c418 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -259,7 +259,7 @@ static int lpi2c_imx_master_enable(struct lpi2c_imx_struct *lpi2c_imx)
 	unsigned int temp;
 	int ret;
 
-	ret = pm_runtime_get_sync(lpi2c_imx->adapter.dev.parent);
+	ret = pm_runtime_resume_and_get(lpi2c_imx->adapter.dev.parent);
 	if (ret < 0)
 		return ret;
 
-- 
2.17.1


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2021-04-08 11:19 [PATCH -next] i2c: imx-lpi2c: fix PM reference leak in lpi2c_imx_master_enable() Ye Weihua
2021-04-14  7:56 ` Wolfram Sang

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