Re: [PATCH RFC v6 1/1] leds: asus-aura-scsi: Add ASUS Aura RGB LED driver for ROG NVMe enclosures

[Liang Haowen]

Answers inline; v7 follows as its own thread.

> What patch format is this?  How did you submit it?

A hand-rolled Python SMTP script, which is as ill-advised as it
sounds. v7 goes out with git send-email, so the format is the
standard one from here on.

> If the SCSI DH the right approach here?

It is unusual, and it was a pragmatic out-of-tree choice rather than
a design statement. The enclosure exposes a single mass-storage
interface that usb-storage owns, so a USB interface driver cannot
claim it without taking the disk down with it, and hooking the SCSI
bus from a module is not possible without the unexported
scsi_bus_type. The device handler was the one hook that observes the
sdev without claiming it, which keeps the enclosure a normal block
device. For in-tree the plan is the split mentioned in the v6 cover
letter: the SCSI attachment moves under drivers/scsi (notifier or an
exported attach helper, whichever the SCSI side prefers) and the LED
part stays in drivers/leds. Happy to rework the attachment in
whichever form you and the SCSI folks prefer.

> Shouldn't this live in drivers/leds/rgb ?

Yes. v7 moves it to drivers/leds/rgb/leds-asus-aura-scsi.c. It still
has no Kconfig wiring; it is the verified out-of-tree module posted
for the API discussion, as the commit message notes.