linux-kernel - Re: [PATCH v3 RESEND] scsi: report 'INQUIRY result too short' once per host

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Message-ID: <56335AAD.4040506@suse.de>
Date:	Fri, 30 Oct 2015 12:55:25 +0100
From:	Hannes Reinecke <hare@...e.de>
To:	Vitaly Kuznetsov <vkuznets@...hat.com>,
	James Bottomley <JBottomley@...n.com>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	"K. Y. Srinivasan\"" <kys@...rosoft.com>,
	Long Li <longli@...rosoft.com>,
	Dexuan Cui <decui@...rosoft.com>
Subject: Re: [PATCH v3 RESEND] scsi: report 'INQUIRY result too short' once
 per host

On 10/30/2015 12:40 PM, Vitaly Kuznetsov wrote:
> Some host adapters (e.g. Hyper-V storvsc) are known for not respecting the
> SPC-2/3/4 requirement for 'INQUIRY data (see table ...) shall contain at
> least 36 bytes'. As a result we get tons on 'scsi 0:7:1:1: scsi scan:
> INQUIRY result too short (5), using 36' messages on console. This can be
> problematic for slow consoles. Introduce short_inquiry flag in struct
> Scsi_Host to print the message once per host.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
> ---
> Changes since v3 RESEND:
> - Sorry, I screwed up James address when sending 'v3 RESEND'.
> 
> Changes since v3:
> - no changes, this is just a RESEND.
> 
> Changes since v2:
> - This is a successor of previously sent (and still not merged) "scsi:
>   introduce short_inquiry flag for broken host adapters" patch. I'm not
>   particularly sure which solution is better but I'm leaning towards this
>   one as it doesn't require changes to adapter drivers.
> ---
>  drivers/scsi/scsi_scan.c | 9 ++++++---
>  include/scsi/scsi_host.h | 3 +++
>  2 files changed, 9 insertions(+), 3 deletions(-)
> 
Why not printk_once?
Should achieve the same result, and we're saving yet another flag...

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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