linux-kernel - Re: [PATCH 2/5] USB Kconfig: Select SCSI for USB Mass Storage support

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Message-Id: <200801062007.31516.a1426z@gawab.com>
Date:	Sun, 6 Jan 2008 20:07:31 +0300
From:	Al Boldi <a1426z@...ab.com>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	Sam Ravnborg <sam@...nborg.org>, Adrian Bunk <bunk@...nel.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	David Brownell <david-b@...bell.net>, Greg KH <greg@...ah.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/5] USB Kconfig: Select SCSI for USB Mass Storage support

Stefan Richter wrote:
> Al Boldi wrote:
> > Sam Ravnborg wrote:
> >> And that requires you to use select only to select symbols with
> >> no dependencies.
> >>
> >> In this case we do not know if BLOCK is enabled or not.
> >
> > Good point!  How about we solve it like this:
> >
> >   	menuconfig USB_STORAGE
> >   	tristate "USB Mass Storage support"
> > -	depends on USB && SCSI
> > +	depends on USB && BLOCK
> > +	select SCSI
>
> Still wrong. SCSI also needs HAS_DMA and SCSI_DMA.

I don't think so.  SCSI selects SCSI_DMA, it doesn't depend on it.  So it's 
safe to select SCSI here, as libata does it the same way.


Thanks!

--
Al

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