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| author |   dinghao.liu@zju.edu.cn <dinghao.liu@zju.edu.cn> | 2020-08-21 16:15:13 +0800 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2020-08-28 16:58:30 +1000 |
| commit | b7b57a5643c2ae45afe6aa5e73363b553cacd14b (patch) | |
| tree | be9469cdda9188c9c10889b9b187ef5f9cb917fc | |
| parent | crypto: mediatek - Fix endianness bugs and sparse warnings (diff) | |
| download | wireguard-linux-b7b57a5643c2ae45afe6aa5e73363b553cacd14b.tar.xz wireguard-linux-b7b57a5643c2ae45afe6aa5e73363b553cacd14b.zip | |
crypto: ccree - fix runtime PM imbalance on error
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@zju.edu.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/ccree/cc_pm.c | 6 |
1 files changed, 5 insertions, 1 deletions
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) |