linux-kernel - Re: [PATCH] Perverting cciss

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Message-ID: <20070405100326.GA19092@infradead.org>
Date:	Thu, 5 Apr 2007 11:03:26 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Hannes Reinecke <hare@...e.de>
Cc:	Mike Miller <mike.miller@...com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	SCSI Mailing List <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH] Perverting cciss

On Thu, Apr 05, 2007 at 11:58:06AM +0200, Hannes Reinecke wrote:
> Hi All,
> 
> this patch adds the SG_IO ioctl to the cciss driver.
> As the driver is capable of sending SCSI CDBs to the controller there is
> no reason why we shouldn't exploit it.
> This way we get to use all the nice sg_utils for the cciss driver.
> And a persistent device name for free.

Instead of adding yet another implementation of SG_IO please implement
support for REQ_TYPE_BLOCK_PC requests and add all the nice block layer
passthrough ioctls to it.

> Makes one wonder why this one is not implemented as a SCSI driver in the
> first place.

It probably should have been a scsi driver, but it's far too late now.

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