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| author | Marek Vasut <marex@denx.de> | 2024-04-19 07:01:13 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-04-26 11:26:09 +0200 |
| commit | da62ed5c019cc48648f37c7a07e6a56cf637a795 (patch) | |
| tree | debefe87d1e9ee8c086b6823e9998deca96692a2 /drivers/char/hw_random/stm32-rng.c | |
| parent | hwrng: stm32 - use logical OR in conditional (diff) | |
| download | linux-da62ed5c019cc48648f37c7a07e6a56cf637a795.tar.xz linux-da62ed5c019cc48648f37c7a07e6a56cf637a795.zip | |
hwrng: stm32 - put IP into RPM suspend on failure
In case of an irrecoverable failure, put the IP into RPM suspend
to avoid RPM imbalance. I did not trigger this case, but it seems
it should be done based on reading the code.
Fixes: b17bc6eb7c2b ("hwrng: stm32 - rework error handling in stm32_rng_read()")
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random/stm32-rng.c')
| -rw-r--r-- | drivers/char/hw_random/stm32-rng.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/char/hw_random/stm32-rng.c b/drivers/char/hw_random/stm32-rng.c index 1cc61ef8ee54..b6182f86d8a4 100644 --- a/drivers/char/hw_random/stm32-rng.c +++ b/drivers/char/hw_random/stm32-rng.c @@ -220,7 +220,8 @@ static int stm32_rng_read(struct hwrng *rng, void *data, size_t max, bool wait) if (err && i > RNG_NB_RECOVER_TRIES) { dev_err((struct device *)priv->rng.priv, "Couldn't recover from seed error\n"); - return -ENOTRECOVERABLE; + retval = -ENOTRECOVERABLE; + goto exit_rpm; } continue; @@ -238,7 +239,8 @@ static int stm32_rng_read(struct hwrng *rng, void *data, size_t max, bool wait) if (err && i > RNG_NB_RECOVER_TRIES) { dev_err((struct device *)priv->rng.priv, "Couldn't recover from seed error"); - return -ENOTRECOVERABLE; + retval = -ENOTRECOVERABLE; + goto exit_rpm; } continue; @@ -250,6 +252,7 @@ static int stm32_rng_read(struct hwrng *rng, void *data, size_t max, bool wait) max -= sizeof(u32); } +exit_rpm: pm_runtime_mark_last_busy((struct device *) priv->rng.priv); pm_runtime_put_sync_autosuspend((struct device *) priv->rng.priv); |