* [PATCH] hwrng: omap - Only fail if pm_runtime_get_sync returns < 0
@ 2016-09-20 15:25 Dave Gerlach
2016-09-22 10:46 ` Herbert Xu
0 siblings, 1 reply; 2+ messages in thread
From: Dave Gerlach @ 2016-09-20 15:25 UTC (permalink / raw)
To: Deepak Saxena, Matt Mackall, Herbert Xu, Nishanth Menon
Cc: linux-kernel, linux-crypto, linux-arm-kernel, linux-omap, Dave Gerlach
Currently omap-rng checks the return value of pm_runtime_get_sync and
reports failure if anything is returned, however it should be checking
if ret < 0 as pm_runtime_get_sync return 0 on success but also can return
1 if the device was already active which is not a failure case. Only
values < 0 are actual failures.
Fixes: 61dc0a446e5d ("hwrng: omap - Fix assumption that runtime_get_sync will always succeed")
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
drivers/char/hw_random/omap-rng.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
index 01d4be2c354b..f5c26a5f6875 100644
--- a/drivers/char/hw_random/omap-rng.c
+++ b/drivers/char/hw_random/omap-rng.c
@@ -385,7 +385,7 @@ static int omap_rng_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_get_sync(&pdev->dev);
- if (ret) {
+ if (ret < 0) {
dev_err(&pdev->dev, "Failed to runtime_get device: %d\n", ret);
pm_runtime_put_noidle(&pdev->dev);
goto err_ioremap;
@@ -443,7 +443,7 @@ static int __maybe_unused omap_rng_resume(struct device *dev)
int ret;
ret = pm_runtime_get_sync(dev);
- if (ret) {
+ if (ret < 0) {
dev_err(dev, "Failed to runtime_get device: %d\n", ret);
pm_runtime_put_noidle(dev);
return ret;
--
2.9.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] hwrng: omap - Only fail if pm_runtime_get_sync returns < 0
2016-09-20 15:25 [PATCH] hwrng: omap - Only fail if pm_runtime_get_sync returns < 0 Dave Gerlach
@ 2016-09-22 10:46 ` Herbert Xu
0 siblings, 0 replies; 2+ messages in thread
From: Herbert Xu @ 2016-09-22 10:46 UTC (permalink / raw)
To: Dave Gerlach
Cc: Deepak Saxena, Matt Mackall, Nishanth Menon, linux-kernel,
linux-crypto, linux-arm-kernel, linux-omap
On Tue, Sep 20, 2016 at 10:25:40AM -0500, Dave Gerlach wrote:
> Currently omap-rng checks the return value of pm_runtime_get_sync and
> reports failure if anything is returned, however it should be checking
> if ret < 0 as pm_runtime_get_sync return 0 on success but also can return
> 1 if the device was already active which is not a failure case. Only
> values < 0 are actual failures.
>
> Fixes: 61dc0a446e5d ("hwrng: omap - Fix assumption that runtime_get_sync will always succeed")
> Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Patch applied. Thanks.
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
^ permalink raw reply [flat|nested] 2+ messages in thread
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