linux-kernel - Re: [PATCH] scsi_dh: Fix return value of scsi_dh

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Message-ID: <4EEF2714.1080402@suse.de>
Date:	Mon, 19 Dec 2011 12:59:16 +0100
From:	Hannes Reinecke <hare@...e.de>
To:	Richard Weinberger <richard@....at>
Cc:	James Bottomley <James.Bottomley@...senPartnership.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi_dh: Fix return value of scsi_dh_attach()

On 12/18/2011 03:53 PM, Richard Weinberger wrote:
> Am 18.12.2011 15:45, schrieb James Bottomley:
>> On Sun, 2011-12-18 at 15:43 +0100, Richard Weinberger wrote:
>>> Am 18.11.2011 00:34, schrieb Richard Weinberger:
>>>> scsi_dh_attach() should return a negative value on error.
>>>>
>>>> Signed-off-by: Richard Weinberger <richard@....at>
>>>> ---
>>>>  include/scsi/scsi_dh.h |    2 +-
>>>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>>>
>>>> diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h
>>>> index e3f2db2..e07ab10 100644
>>>> --- a/include/scsi/scsi_dh.h
>>>> +++ b/include/scsi/scsi_dh.h
>>>> @@ -74,7 +74,7 @@ static inline int scsi_dh_handler_exist(const char *name)
>>>>  }
>>>>  static inline int scsi_dh_attach(struct request_queue *req, const char *name)
>>>>  {
>>>> -	return SCSI_DH_NOSYS;
>>>> +	return -SCSI_DH_NOSYS;
>>>>  }
>>>>  static inline void scsi_dh_detach(struct request_queue *q)
>>>>  {
>>>
>>> James,
>>>
>>> can you please pickup this patch?
>>
>> It still needs an ack from rdac people (other one just got overlooked).
>>
> 
> Who are the rdac people?
> I sent the patch to all addresses reported by get_maintainers.pl.
> 
Nack.

This patch is wrong.

scsi_dh_attach() (and, incidentally, scsi_dh_set_params()) should
return a standard error value. SCSI_DH_XXX are internal to
device_handler and should never see the light of day.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@...e.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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