From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brian Norris Date: Wed, 06 Sep 2017 18:40:46 +0000 Subject: Re: [PATCH][thermal-next] thermal: brcmstb: remove two redundant integer range checks Message-Id: <20170906184046.GB35422@google.com> List-Id: References: <20170903131619.6857-1-colin.king@canonical.com> In-Reply-To: <20170903131619.6857-1-colin.king@canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org Hi, On Sun, Sep 03, 2017 at 02:16:19PM +0100, Colin King wrote: > From: Colin Ian King > > The comparisons for integer low on low > INT_MAX and also > integer high > INT_MAX are never going to be true since an > int type cannot be greater than INT_MAX. Remove these redundant > checks. > > Detected by: CoverityScan CID#1455245, 1455248 ("Operands don't affect > result (CONSTANT_EXPRESSION_RESULT)") > > Signed-off-by: Colin Ian King > --- > drivers/thermal/broadcom/brcmstb_thermal.c | 4 ---- > 1 file changed, 4 deletions(-) > > diff --git a/drivers/thermal/broadcom/brcmstb_thermal.c b/drivers/thermal/broadcom/brcmstb_thermal.c > index 87b8e7a86ee3..bcb3945feea6 100644 > --- a/drivers/thermal/broadcom/brcmstb_thermal.c > +++ b/drivers/thermal/broadcom/brcmstb_thermal.c > @@ -278,8 +278,6 @@ static int brcmstb_set_trips(void *data, int low, int high) > dev_dbg(priv->dev, "set trips %d <--> %d\n", low, high); > > if (low) { > - if (low > INT_MAX) > - low = INT_MAX; > avs_tmon_set_trip_temp(priv, TMON_TRIP_TYPE_LOW, low); > avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 1); > } else { > @@ -287,8 +285,6 @@ static int brcmstb_set_trips(void *data, int low, int high) > } > > if (high < ULONG_MAX) { Dan's robots noticed that the above condition is not useful either (on architectures where INT_MAX < ULONG_MAX -- i.e., all?), since 'high' is 'int', not 'unsigned long'. Should probably fix that s/ULONG_MAX/INT_MAX/ ? Brian > - if (high > INT_MAX) > - high = INT_MAX; > avs_tmon_set_trip_temp(priv, TMON_TRIP_TYPE_HIGH, high); > avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 1); > } else { > -- > 2.14.1 >