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| author | Shannon Nelson <shannon.nelson@oracle.com> | 2017-01-12 19:52:46 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-01-13 11:47:18 +0100 |
| commit | db602a7f940a71870c17e39bcbe4e4d7a4a8273e (patch) | |
| tree | bd588f51968d4fbb80591cdc87adc94b20d6b2ba /drivers/char/hw_random/n2-drv.c | |
| parent | crypto: mediatek - make symbol of_crypto_id static (diff) | |
| download | linux-db602a7f940a71870c17e39bcbe4e4d7a4a8273e.tar.xz linux-db602a7f940a71870c17e39bcbe4e4d7a4a8273e.zip | |
hwrng: n2 - limit error spewage when self-test fails
If the self-test fails, it probably won't actually suddenly
start working. Currently, this causes an endless spew of
error messages on the console and in the logs, so this patch
adds a limiter to the test.
Reported-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random/n2-drv.c')
| -rw-r--r-- | drivers/char/hw_random/n2-drv.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c index 3b06c1d6cfb2..102560ffed44 100644 --- a/drivers/char/hw_random/n2-drv.c +++ b/drivers/char/hw_random/n2-drv.c @@ -589,6 +589,7 @@ static void n2rng_work(struct work_struct *work) { struct n2rng *np = container_of(work, struct n2rng, work.work); int err = 0; + static int retries = 4; if (!(np->flags & N2RNG_FLAG_CONTROL)) { err = n2rng_guest_check(np); @@ -606,7 +607,9 @@ static void n2rng_work(struct work_struct *work) dev_info(&np->op->dev, "RNG ready\n"); } - if (err && !(np->flags & N2RNG_FLAG_SHUTDOWN)) + if (--retries == 0) + dev_err(&np->op->dev, "Self-test retries failed, RNG not ready\n"); + else if (err && !(np->flags & N2RNG_FLAG_SHUTDOWN)) schedule_delayed_work(&np->work, HZ * 2); } |