From: Mike Frysinger <vapier@xxxxxxxxxxxx>
If you build in hwrng & tpm-rng, but boot on a system that doesn't
have a tpm (like via KVM), hwrng will spam the logs every 10 seconds
with the line:
hwrng: no data available
This isn't terribly useful, so squelch the error in the ENODEV case.
For all other errors, we still warn, and include the actual error.
Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxxxx>
---
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 503a41dfa193..da24bd5a9902 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -392,7 +392,8 @@ static int hwrng_fillfn(void *unused)
mutex_unlock(&reading_mutex);
put_rng(rng);
if (rc <= 0) {
- pr_warn("hwrng: no data available\n");
+ if (rc != -ENODEV)
+ pr_warn("hwrng: no data available: %li\n", rc);
msleep_interruptible(10000);
continue;
}
--
2.12.0
