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Message-ID: <87va2fyu9g.fsf@belgarion.home>
Date: Wed, 23 Jan 2019 21:49:15 +0100
From: Robert Jarzmik <robert.jarzmik@...e.fr>
To: Boris Brezillon <bbrezillon@...nel.org>
Cc: YueHaibing <yuehaibing@...wei.com>, <dwmw2@...radead.org>,
<computersforpeace@...il.com>, <marek.vasut@...il.com>,
<richard@....at>, <linux-kernel@...r.kernel.org>,
<linux-mtd@...ts.infradead.org>
Subject: Re: [PATCH -next] mtd: docg3: Fix passing zero to 'PTR_ERR' warning in doc_probe_device
Boris Brezillon <bbrezillon@...nel.org> writes:
> On Wed, 23 Jan 2019 17:43:58 +0800
> YueHaibing <yuehaibing@...wei.com> wrote:
>
>> On 2019/1/23 17:12, Boris Brezillon wrote:
>> > On Wed, 23 Jan 2019 14:58:27 +0800
>> > YueHaibing <yuehaibing@...wei.com> wrote:
>> >
>> >> Fix a static code checker warning:
>> >> drivers/mtd/devices/docg3.c:1875
>> >> doc_probe_device() warn: passing zero to 'ERR_PTR'
>> >>
>> >> Fixes: ae9d4934b2d7 ("mtd: docg3: add multiple floor support")
>> >> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
>> >> ---
>> >> drivers/mtd/devices/docg3.c | 2 +-
>> >> 1 file changed, 1 insertion(+), 1 deletion(-)
>> >>
>> >> diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c
>> >> index 4c94fc0..60ddc38 100644
>> >> --- a/drivers/mtd/devices/docg3.c
>> >> +++ b/drivers/mtd/devices/docg3.c
>> >> @@ -1872,7 +1872,7 @@ doc_probe_device(struct docg3_cascade *cascade, int floor, struct device *dev)
>> >> nomem2:
>> >> kfree(docg3);
>> >> nomem1:
>> >> - return ERR_PTR(ret);
>> >> + return ret ? ERR_PTR(ret) : NULL;
>> >> }
>> >>
>> >
>> > This is not the right fix, you should instead set ret to -EINVAL:
>>
>> Thanks , will fix it in v2.
>>
>> And seems doc_probe_device cannot return NULL. The NULL check of doc_probe_device
>> in docg3_probe also can been removed, right?
>
> Hm, looks like the ret = 0 was intentional (to identify when ID is
> invalid). Let's just keep your initial patch.
Indeed, that's for the multiple floor configuration if I remember correctly.
Acked-by: Robert Jarzmik <robert.jarzmik@...e.fr>
Cheers.
--
Robert
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