This is a note to let you know that I've just added the patch titled
hwrng: ks-sa - Fix runtime PM imbalance on error
to the 5.4-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:
hwrng-ks-sa-fix-runtime-pm-imbalance-on-error.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 51ed647c2e3e26cf9b2b5eb3056709c06e48840f
Author: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Date: Thu May 28 15:21:04 2020 +0800
hwrng: ks-sa - Fix runtime PM imbalance on error
[ Upstream commit 95459261c99f1621d90bc628c2a48e60b7cf9a88 ]
pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.
Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c
index a67430010aa68..5c7d3dfcfdd04 100644
--- a/drivers/char/hw_random/ks-sa-rng.c
+++ b/drivers/char/hw_random/ks-sa-rng.c
@@ -208,6 +208,7 @@ static int ks_sa_rng_probe(struct platform_device *pdev)
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "Failed to enable SA power-domain\n");
+ pm_runtime_put_noidle(dev);
pm_runtime_disable(dev);
return ret;
}
