[PATCH] [v2] hwrng: core: Fix missing check during driver release

[Aditya Pakki]

devres_release can return -ENOENT if the device is not freed. The fix
throws a warning consistent with other invocations.

Signed-off-by: Aditya Pakki <pakki...@umn.edu>
---
 drivers/char/hw_random/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index 95be7228f327..1b05da40626a 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -578,7 +578,8 @@ EXPORT_SYMBOL_GPL(devm_hwrng_register);
 
 void devm_hwrng_unregister(struct device *dev, struct hwrng *rng)
 {
-       devres_release(dev, devm_hwrng_release, devm_hwrng_match, rng);
+       WARN_ON(devres_release(dev, devm_hwrng_release,
+                               devm_hwrng_match, rng));
 }
 EXPORT_SYMBOL_GPL(devm_hwrng_unregister);
 
-- 
2.17.1