linux-kernel - Re: [PATCH][V2][next] rtc: ds1307: check for failed memory allocation on wdt

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Message-ID: <20200403092245.GR3683@piout.net>
Date:   Fri, 3 Apr 2020 11:22:45 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Colin King <colin.king@...onical.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Chris Packham <chris.packham@...iedtelesis.co.nz>,
        linux-rtc@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][V2][next] rtc: ds1307: check for failed memory
 allocation on wdt

On 03/04/2020 11:45:04+0300, Dan Carpenter wrote:
> On Thu, Apr 02, 2020 at 04:53:12PM +0200, Alexandre Belloni wrote:
> > 
> > As stated, I also prefer keeping the watchdog optional and ignore the
> > error.
> 
> Hopefully you aren't running out of memory on start up.  In current
> kernels small memory allocations like this never fail so it doesn't
> really affect runtime.  It only silences the NULL dereference static
> checker warning.
> 

Yes, so the

if (!wdt)
 return;

would be enough instead of introducing unnecessary error handling.

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com