Commit 1ff69adf authored by Maxime Coquelin's avatar Maxime Coquelin Committed by Herbert Xu

hwrng: stm32 - fix maybe uninitialized variable warning

This patch fixes the following warning:
drivers/char/hw_random/stm32-rng.c: In function 'stm32_rng_read':
drivers/char/hw_random/stm32-rng.c:82:19: warning: 'sr' may be used
                                        uninitialized in this function
Reported-by: default avatarSudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Suggested-by: default avatarArnd Bergmann <arnd@arndb.de>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: default avatarMaxime Coquelin <mcoquelin.stm32@gmail.com>
Reviewed-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent f6c60b15
......@@ -69,8 +69,12 @@ static int stm32_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
}
/* If error detected or data not ready... */
if (sr != RNG_SR_DRDY)
if (sr != RNG_SR_DRDY) {
if (WARN_ONCE(sr & (RNG_SR_SEIS | RNG_SR_CEIS),
"bad RNG status - %x\n", sr))
writel_relaxed(0, priv->base + RNG_SR);
break;
}
*(u32 *)data = readl_relaxed(priv->base + RNG_DR);
......@@ -79,10 +83,6 @@ static int stm32_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
max -= sizeof(u32);
}
if (WARN_ONCE(sr & (RNG_SR_SEIS | RNG_SR_CEIS),
"bad RNG status - %x\n", sr))
writel_relaxed(0, priv->base + RNG_SR);
pm_runtime_mark_last_busy((struct device *) priv->rng.priv);
pm_runtime_put_sync_autosuspend((struct device *) priv->rng.priv);
......
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