linux-kernel - Re: [PATCH] staging: greybus: use proper return type for wait_for_completion

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Message-ID: <20190430095821.GD2269@kadam>
Date:   Tue, 30 Apr 2019 12:58:21 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Nicholas Mc Guire <hofrat@...dl.org>
Cc:     David Lin <dtwlin@...il.com>, devel@...verdev.osuosl.org,
        Alex Elder <elder@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johan Hovold <johan@...nel.org>, linux-kernel@...r.kernel.org,
        greybus-dev@...ts.linaro.org
Subject: Re: [PATCH] staging: greybus: use proper return type for
 wait_for_completion_timeout

On Sat, Apr 27, 2019 at 05:27:25AM +0200, Nicholas Mc Guire wrote:
> wait_for_completion_timeout() returns unsigned long (0 on timeout or
> remaining jiffies) not int. 
> 

Yeah, but it's fine though because 10000 / 256 fits into int without a
problem.

I'm not sure this sort of patch is worth it when it's just a style
debate instead of a bugfix.  I'm a little bit torn about this.  In
Smatch, I run into this issue one in a while where Smatch doesn't know
if the timeout is less than int.  Right now I hacked the DB to say that
these functions always return < INT_MAX.

Anyway, for sure the commit message should say that it's just a cleanup
and not a bugfix.

regards,
dan carpenter