Re: [PATCH RESEND 2/4] scsi: sg: implement BLKSSZGET

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On Fri, Sep 11, 2020 at 10:52:19AM +0800, Tom Yan wrote:
> > How is that an advantage?  Applications that works with block devices
> > don't really work with a magic passthrough character device.
> 
> You must assume that there are applications already assuming that
> work. (And it will, at least in some cases, if this series get
> merged.)

Why "must" I assume that?

> And you have not been giving me a solid point anyway, as I said, it's
> just queue_*() at the end of the day; regardless of whether those
> would work in all sg cases, we have been using them in the sg driver
> anyway.
> 
> And it's not like we have to guarantee that (the) ioctls can work in
> every case anyway, right? (Especially when they aren't named SG_*).

No.  While it is unfortunte we have all kinds of cases of ioctls working
differnetly on different devices.

> 
> I mean, what's even your point? How do you propose we fix this?

I propose to not "fix" anything, because nothing is broken except for
maybe a lack of documentation.



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