From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Sverdlin Subject: Re: [PATCH v2 1/1] i2c: core: fix a code to suppress a warning Date: Fri, 18 Sep 2015 13:10:05 +0200 Message-ID: <55FBF10D.2020609@nokia.com> References: <1442574399-26131-1-git-send-email-andriy.shevchenko@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1442574399-26131-1-git-send-email-andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: EXT Andy Shevchenko , linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Wolfram Sang , Vladimir Zapolskiy List-Id: linux-i2c@vger.kernel.org On 18/09/15 13:06, EXT Andy Shevchenko wrote: > There is a warning when compiling i2c-core.c > drivers/i2c/i2c-core.c:2561:36: warning: dubious: x | !y > > Fix it by using a plain bitwise AND since I2C_M_RD is a bit 0 and thus we are > on the safe side. > > Signed-off-by: Andy Shevchenko Reviewed-by: Alexander Sverdlin > --- > drivers/i2c/i2c-core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c > index 5f89f1e..a732107 100644 > --- a/drivers/i2c/i2c-core.c > +++ b/drivers/i2c/i2c-core.c > @@ -2555,7 +2555,7 @@ static u8 i2c_smbus_pec(u8 crc, u8 *p, size_t count) > static u8 i2c_smbus_msg_pec(u8 pec, struct i2c_msg *msg) > { > /* The address will be sent first */ > - u8 addr = (msg->addr << 1) | !!(msg->flags & I2C_M_RD); > + u8 addr = (msg->addr << 1) | (msg->flags & I2C_M_RD); > pec = i2c_smbus_pec(pec, &addr, 1); > > /* The data buffer follows */ -- Best regards, Alexander Sverdlin.