pm_runtime_get_sync() increments the runtime PM usage counter
even when it returns an error code. However, users of cc_pm_get(),
a direct wrapper of pm_runtime_get_sync(), assume that PM usage
counter will not change on error. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.
Fixes: 8c7849a30255c ("crypto: ccree - simplify Runtime PM handling")
Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
---
drivers/crypto/ccree/cc_pm.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/ccree/cc_pm.c b/drivers/crypto/ccree/cc_pm.c
index d39e1664fc7e..3c65bf070c90 100644
--- a/drivers/crypto/ccree/cc_pm.c
+++ b/drivers/crypto/ccree/cc_pm.c
@@ -65,8 +65,12 @@ const struct dev_pm_ops ccree_pm = {
int cc_pm_get(struct device *dev)
{
int rc = pm_runtime_get_sync(dev);
+ if (rc < 0) {
+ pm_runtime_put_noidle(dev);
+ return rc;
+ }
- return (rc == 1 ? 0 : rc);
+ return 0;
}
void cc_pm_put_suspend(struct device *dev)
--
2.17.1
