| Message ID | 1464255297-21090-1-git-send-email-mcoquelin.stm32@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 26/05/16 10:34, Maxime Coquelin wrote: > 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 <sudip.mukherjee@codethink.co.uk> > Suggested-by: Arnd Bergmann <arnd@arndb.de> > Cc: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> > Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> > --- > 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); > >
On Thu, May 26, 2016 at 11:34:57AM +0200, Maxime Coquelin wrote: > 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 <sudip.mukherjee@codethink.co.uk> > Suggested-by: Arnd Bergmann <arnd@arndb.de> > Cc: Daniel Thompson <daniel.thompson@linaro.org> > Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> Applied.
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);
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 <sudip.mukherjee@codethink.co.uk> Suggested-by: Arnd Bergmann <arnd@arndb.de> Cc: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> --- drivers/char/hw_random/stm32-rng.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)