From: Qinglang Miao miaoqinglang@huawei.com
mainline inclusion from mainline-v5.13-rc1 commit 278e5bbdb9a94fa063c0f9bcde2479d0b8042462 category: bugfix bugzilla: NA CVE: CVE-2020-36782
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The PM reference count is not expected to be incremented on return in lpi2c_imx_master_enable.
However, pm_runtime_get_sync will increment the PM reference count even failed. Forgetting to putting operation will result in a reference leak here.
Replace it with pm_runtime_resume_and_get to keep usage counter balanced.
Fixes: 13d6eb20fc79 ("i2c: imx-lpi2c: add runtime pm support") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Qinglang Miao miaoqinglang@huawei.com Signed-off-by: Wolfram Sang wsa@kernel.org Signed-off-by: Zhang Xiaoxu zhangxiaoxu5@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 06c4c767af32..d5182c446b79 100644 --- a/drivers/i2c/busses/i2c-imx-lpi2c.c +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c @@ -265,7 +265,7 @@ 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;