Am Donnerstag, den 10.08.2017, 07:56 +0100 schrieb Okash Khawaja:
> Hi,
> struct usb_serial_device has probe and attach callbacks. After attach
> is invoked, device minor numbers are allocated and then registered with
> driver core. So attach callback doesn't know minor number.
> Can a usb-serial driver know about device minor number as soon as it is
> registered with driver core?

Merely registering a driver does not allocate a minor. And is the order
of device enumeration is unknown at that time, it cannot know a minor

You cannot make assumptions about driver load. Your driver was loaded.
End of story. Register it with the proper subsystem.


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