This is a note to let you know that I've just added the patch titled
crypto: ccree - fix runtime PM imbalance on error
to the 5.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-ccree-fix-runtime-pm-imbalance-on-error.patch
and it can be found in the queue-5.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2c58011c7e09969d48bf5a7b20143181aa7e4af1
Author: dinghao.liu@xxxxxxxxxx <dinghao.liu@xxxxxxxxxx>
Date: Fri Aug 21 16:15:13 2020 +0800
crypto: ccree - fix runtime PM imbalance on error
[ Upstream commit b7b57a5643c2ae45afe6aa5e73363b553cacd14b ]
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.liu@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/crypto/ccree/cc_pm.c b/drivers/crypto/ccree/cc_pm.c
index d39e1664fc7ed..3c65bf070c908 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)
