hwrng: omap - Only fail if pm_runtime_get_sync returns < 0

commit ad8529fde9e3601180a839867a8ab041109aebb5 upstream.

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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
index 01d4be2c354b06a83b176c05536e7023e0551097..f5c26a5f687582c1cbcd3ea981aae7a3e6738ac7 100644 (file)
--- 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;