[PATCH] usb: Correct dependencies around USB_EMUL

[Tom Rini]

On Sat, Mar 21, 2026 at 02:24:04AM +0100, Marek Vasut wrote:
> On 3/20/26 9:53 PM, Tom Rini wrote:
> > The symbol USB_EMUL is how sandbox has access to USB. It's
> > implementation however enforces a few other requirements. It must have
> > SCSI enabled, and in turn that means it must have BLK enabled. Finally,
> > we should not be using SANDBOX itself as a symbol to decide what to
> > build or not build here, as SANDBOX is selected for COMPILE_TEST builds
> > as well and so may not have enabled the sandbox specific USB support.
> > 
> > Signed-off-by: Tom Rini <trini at konsulko.com>
> > ---
> > Cc: Marek Vasut <marek.vasut at mailbox.org>
> > ---
> >   drivers/usb/emul/Kconfig  | 2 ++
> >   drivers/usb/host/Makefile | 2 +-
> >   2 files changed, 3 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/usb/emul/Kconfig b/drivers/usb/emul/Kconfig
> > index 279f6c6d7404..8ba372453e37 100644
> > --- a/drivers/usb/emul/Kconfig
> > +++ b/drivers/usb/emul/Kconfig
> > @@ -1,7 +1,9 @@
> >   config USB_EMUL
> >   	bool "Support for USB device emulation"
> >   	depends on SANDBOX
> > +	select BLK
> 
> The select SCSI and Makefile change I do understand. But why do we also need
> BLK ? I can't find anything which would interact with BLK in the sandbox USB
> emulation ?

Ah woops, I was fixing too many problems at once then and forgot BLK is
select'd by SCSI now, not depends on, so indeed, it's not required here.

-- 
Tom
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