linux-kernel - Re: [PATCH v3] i2c: ocores: add missing unwind goto in `ocores_i2c

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Message-ID: <2bbc856b-c65a-4b42-8193-3a990e2155c0@kili.mountain>
Date:   Tue, 18 Apr 2023 10:15:03 +0300
From:   Dan Carpenter <error27@...il.com>
To:     Wang Zhang <silver_code@...t.edu.cn>
Cc:     Peter Korsgaard <peter@...sgaard.com>,
        Andrew Lunn <andrew@...n.ch>,
        hust-os-kernel-patches@...glegroups.com, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] i2c: ocores: add missing unwind goto in
 `ocores_i2c_probe`

On Tue, Apr 18, 2023 at 08:45:20AM +0300, Dan Carpenter wrote:
> On Tue, Apr 18, 2023 at 01:38:13PM +0800, Wang Zhang wrote:
> > Smatch Warns:
> > drivers/i2c/busses/i2c-ocores.c:701 ocores_i2c_probe() warn:
> > missing unwind goto?
> > 
> > The error handling code after the err_clk label should be executed to
> > release any resources that were allocated for the clock if a negative
> > error code returned after platform_get_irq_optional.
> > 
> > Fix this by changing the direct return to `goto err_clk`. 
> > 
> > Signed-off-by: Wang Zhang <silver_code@...t.edu.cn>
> > ---
> > v2->v3: the first patch had issues. Just do a much simpler fix. No need 
> > to add the check. clk_disable_unprepare() has checks for error pointer 
> > and NULL already.
> > v1->v2: change `ocores_i2c_of_probe` to use `devm_clk_get_enabled()`
> 
> I meant send it to the public mailing list.  Don't add the other
> comments which are related to discussions on this list.  Just say that
> the public 1 was buggy and the this new v2 patch is simpler.

Oh, sorry, this was to the public list.  Never mind.  (Technically both
lists are public).

Some of the notes in --- change log are probably confusing to the people
who aren't on the hust-os-kernel-patches@...glegroups.com list...  Maybe
it's only confusing to me...  LOL.  But the patch itself is straight
forward.

regards,
dan carpenter