linux-kernel - Re: [PATCH] staging: rtl8712: remove unused variables

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Message-ID: <20141027121256.GF6879@mwanda>
Date:	Mon, 27 Oct 2014 15:12:57 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	devel@...verdev.osuosl.org,
	Florian Schilhabel <florian.c.schilhabel@...glemail.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org,
	Larry Finger <Larry.Finger@...inger.net>
Subject: Re: [PATCH] staging: rtl8712: remove unused variables

On Mon, Oct 27, 2014 at 05:22:21PM +0530, Sudip Mukherjee wrote:
> On Mon, Oct 27, 2014 at 02:13:12PM +0300, Dan Carpenter wrote:
> > On Sun, Oct 26, 2014 at 06:03:33PM +0530, Sudip Mukherjee wrote:
> > > @@ -262,7 +257,7 @@ static u8 rtl8712_dl_fw(struct _adapter *padapter)
> > >  		if (tmp8_a != (tmp8|BIT(2)))
> > >  			goto exit_fail;
> > >  
> > > -		tmp32 = r8712_read32(padapter, TCR);
> > > +		r8712_read32(padapter, TCR);
> > 
> > I wonder if we actually need to call r8712_read32() here?  It's not
> > clear.  The changelog should say one way or the other.  Maybe something
> > like "I left a call to r8712_read32(padapter, TCR) because I didn't know
> > if it had side effects".  When you note down questions you have in the
> > changelog that helps reviewers.
> sure. i will resend it with modified commit log.
> r8712_read32() is ultimately calling usb_read32() which is again calling  r8712_usbctrl_vendorreq().
> this r8712_usbctrl_vendorreq() is communicating through the usb bus and is sending and receiving the control msg.
> that is why i didnot remove it.

Yeah.  I'm 95% sure it's not needed, but I suppose it's better to err
on the side of caution.

regards,
dan carpenter

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