From 1ff69adf747e75425d5e67df2f2ac866e7ebd165 Mon Sep 17 00:00:00 2001 From: Maxime Coquelin Date: Thu, 26 May 2016 11:34:57 +0200 Subject: [PATCH] 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: Sudip Mukherjee Suggested-by: Arnd Bergmann Cc: Daniel Thompson Signed-off-by: Maxime Coquelin Reviewed-by: Daniel Thompson Signed-off-by: Herbert Xu --- drivers/char/hw_random/stm32-rng.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/char/hw_random/stm32-rng.c b/drivers/char/hw_random/stm32-rng.c index 92a810648bd0..63d84e6f1891 100644 --- a/drivers/char/hw_random/stm32-rng.c +++ b/drivers/char/hw_random/stm32-rng.c @@ -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); -- 2.20.1