linux-kernel - Re: "WRITE SAME failed. Manually zeroing" with 3w-xxxx driver

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Message-ID: <20130429162907.GH32324@breakpoint.cc>
Date:	Mon, 29 Apr 2013 18:29:07 +0200
From:	Florian Westphal <fw@...len.de>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc:	Florian Westphal <fw@...len.de>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, axboe@...nel.dk,
	adam radford <aradford@...il.com>
Subject: Re: "WRITE SAME failed. Manually zeroing" with 3w-xxxx driver

Martin K. Petersen <martin.petersen@...cle.com> wrote:
> Florian> After update to 3.8 dmesg is spammed with: kernel: [
> Florian> 280.272094] 3w-xxxx: scsi8: Unknown scsi opcode: 0x41 kernel: [
> Florian> 280.272107] sd 8:0:0:0: [sda] Unhandled error code kernel: 
> 
> Interesting. It looks like the 3ware handles this at the driver level
> instead of passing the command through to the disk and letting it
> fail. That in turn means that the logic we have in place to disable WS
> when the disk does not support it does not get triggered.
> 
> The driver should really fill out the sense buffer in that case.
> 
> Could you please test the patch below?

Sure, I'll report back tomorrow.

Thanks for the quick response,
Florian
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