Re: Is it possible for Realtek card reader driver to reside inSCSIsubsystem?

[Greg KH <greg@kroah.com>]

On Mon, Apr 23, 2012 at 04:24:49PM +0800, edwin_rong wrote:
> On 04/23/2012 04:11 PM, James Bottomley wrote:
> >[updated Greg to non-SUSE address]
> >On Mon, 2012-04-23 at 16:00 +0800, edwin_rong wrote:
> >>On 04/23/2012 03:39 PM, James Bottomley wrote:
> >>>On Mon, 2012-04-23 at 11:49 +0800, edwin_rong wrote:
> >>>>Dear James and all :
> >>>>
> >>>>Sorry to disturb you again!
> >>>>
> >>>>I'm an software engineer of Realtek corporation, responsible for writing
> >>>>driver for Realtek Card Reader chips.
> >>>>
> >>>>Our device supports SD/MMC/MS/MSpro/xD series of cards, etc., which is
> >>>>implemented as an SCSI device in our driver,
> >>>>and now our driver rts_pstor is under staging folder of linux kernel, so
> >>>>I want to know whether it is possible to move it out of staging folder,
> >>>>and reside in SCSI subsystem?
> >>>>
> >>>>I also know that both "mmc" and "memstick" subsystem exist in kernel
> >>>>now, but our device is a composition of these types of cards,
> >>>>so it seems not suitable for keeping our driver there.
> >>>>
> >>>>All replies are appreciated.
> >>>The general rule is that if the device itself speaks SCSI ... as in
> >>>either the firmware or the underlying disk does, then you should be
> >>>using SCSI (This doesn't mean you have to have an actual SCSI device
> >>>anywhere ... lots of USB devices are some wierd flash or IDE device
> >>>fronted by a chip that does SCSI<->whatever translation [usually
> >>>badly]).  Conversely if you would be writing your SCSI command emulation
> >>>in the driver, don't ... you should be using another subsystem.
> >>>
> >>>James
> >>>
> >>Dear James,
> >>
> >>Got it, thanks for your response, sincerely.
> >>
> >>As to my case, which subsystem do you think is fit for our driver to
> >>stay, could you give me some suggestions?
> >Well, you said it's a combination of mmc and memstick.  If it can be
> >bound as two separate drivers, I'd say one in each.  If there's magic
> >that has to be done in the binding (as in you need a single bind driver
> >that activates each component), I'd say be guided by the maintainers of
> >those components.  My instinct would be to put it in one and use the
> >other via Kconfig, but whatever they find most appropriate.
> >
> >James
> >
> >
> Gotcha!
> 
> Thanks for your suggestion, James.

Also, at the least, you have a lot of basic coding style issues to clean
up in the drivers/staging/rts_pstor/ directory before your code can move
out of there.  Please start working on that as soon as possible.

thanks,

greg k-h