summaryrefslogtreecommitdiff
path: root/drivers/char
diff options
context:
space:
mode:
authorDaniel Thompson <daniel.thompson@linaro.org>2015-10-16 19:01:51 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2015-10-20 17:10:46 +0300
commitf02b7d0c7b433b9a8175ac9027391272877a43ce (patch)
tree314e976867de305f7069a1f00a0dcd4957167ba7 /drivers/char
parent839a42af9441982311f33241529f711f23c857c8 (diff)
downloadlinux-f02b7d0c7b433b9a8175ac9027391272877a43ce.tar.xz
hwrng: exynos - Fix unbalanced PM runtime get/puts
Currently this driver calls pm_runtime_get_sync() rampantly but never puts anything back. This makes it impossible for the device to autosuspend properly; it will remain fully active after the first use. Fix in the obvious way. Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/hw_random/exynos-rng.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c
index dc4701fd814f..73318e2a34dd 100644
--- a/drivers/char/hw_random/exynos-rng.c
+++ b/drivers/char/hw_random/exynos-rng.c
@@ -95,7 +95,7 @@ static int exynos_read(struct hwrng *rng, void *buf,
*data = exynos_rng_readl(exynos_rng, EXYNOS_PRNG_OUT1_OFFSET);
pm_runtime_mark_last_busy(exynos_rng->dev);
- pm_runtime_autosuspend(exynos_rng->dev);
+ pm_runtime_put_sync_autosuspend(exynos_rng->dev);
return 4;
}