Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752190AbdIFSkw (ORCPT ); Wed, 6 Sep 2017 14:40:52 -0400 Received: from mail-pg0-f68.google.com ([74.125.83.68]:36204 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750836AbdIFSku (ORCPT ); Wed, 6 Sep 2017 14:40:50 -0400 X-Google-Smtp-Source: ADKCNb6kc2Aa99/BwndMqKKjC+uHvue+im0PapMJXD/PjyvpwwDV63LrHqlJFacaMWyG76GyGaLklg== Date: Wed, 6 Sep 2017 11:40:46 -0700 From: Brian Norris To: Colin King Cc: Markus Mayer , bcm-kernel-feedback-list@broadcom.com, Zhang Rui , Eduardo Valentin , Gregory Fong , Florian Fainelli , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Dan Carpenter Subject: Re: [PATCH][thermal-next] thermal: brcmstb: remove two redundant integer range checks Message-ID: <20170906184046.GB35422@google.com> References: <20170903131619.6857-1-colin.king@canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170903131619.6857-1-colin.king@canonical.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1725 Lines: 56 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 >