[PATCH 5.11 120/342] crypto: stm32/cryp - Fix PM reference leak on stm32-cryp.c

From: Greg Kroah-Hartman
Date: Mon May 10 2021 - 07:30:31 EST


From: Shixin Liu <liushixin2@xxxxxxxxxx>

[ Upstream commit 747bf30fd944f02f341b5f3bc7d97a13f2ae2fbe ]

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Signed-off-by: Shixin Liu <liushixin2@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/crypto/stm32/stm32-cryp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c
index 2670c30332fa..7999b26a16ed 100644
--- a/drivers/crypto/stm32/stm32-cryp.c
+++ b/drivers/crypto/stm32/stm32-cryp.c
@@ -542,7 +542,7 @@ static int stm32_cryp_hw_init(struct stm32_cryp *cryp)
int ret;
u32 cfg, hw_mode;

- pm_runtime_get_sync(cryp->dev);
+ pm_runtime_resume_and_get(cryp->dev);

/* Disable interrupt */
stm32_cryp_write(cryp, CRYP_IMSCR, 0);
@@ -2043,7 +2043,7 @@ static int stm32_cryp_remove(struct platform_device *pdev)
if (!cryp)
return -ENODEV;

- ret = pm_runtime_get_sync(cryp->dev);
+ ret = pm_runtime_resume_and_get(cryp->dev);
if (ret < 0)
return ret;

--
2.30.2