linux-kernel - Re: [PATCH] sata_rcar: fix error return code in sata_rcar

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Message-ID: <3944946f-5737-df9f-e8f4-61648f6e0d89@cogentembedded.com>
Date:   Fri, 30 Jun 2017 22:42:01 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Tejun Heo <tj@...nel.org>
Cc:     linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sata_rcar: fix error return code in sata_rcar_probe()

On 06/30/2017 10:36 PM, Gustavo A. R. Silva wrote:

>>> > Print error message and propagate the return value of
>>> > platform_get_irq on failure.
>>>
>>>    You should have probably mentioned that this function no longer returns 0
>>> on error.
>>
>> Yeah, the patches looks good to me but I'd really appreciate more
>> context in the changelogs.  Gustavo, can you please respin the
>> patches?
>>
>
> Absolutely.
>
> What do you think about the following changelog:
>
> platform_get_irq() returns an error code, but the sata_rcar driver
> ignores it and always returns -EINVAL. This is not correct, and

    This *was* correct, because it prevented returning 0 on error.

> prevents -EPROBE_DEFER from being propagated properly.

    Yes, this is a real problem.

> Print error message and propagate the return value of platform_get_irq
> on failure. Also, with this change function sata_rcar_probe() no longer
> returns 0 on error.

    It never did -- I was talking about platform_get_irq() which might return 
0 on error until I fixed it:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af

> Thank you!

MBR, Sergei