Re: [PATCH 4/5] usb_serial: Kill port mutex

[Alan Cox]

On Wed, 7 Oct 2009 22:56:20 +0200
Oliver Neukum <oliver@xxxxxxxxxx> wrote:

> Am Mittwoch, 7. Oktober 2009 20:52:21 schrieb Alan Stern:
> > However in the option and sierra drivers there is a perverse path from
> > close to resume: Both their close methods call
> > usb_autopm_get_interface().  This could be removed without much
> > trouble; perhaps we should do so.
> 
> I am afraid this won't do in the long run. Some drivers will want to
> shut down devices by communicating with them in close().

drivers/serial will need a power management hook to use
tty_port_{open/close} so perhaps that can be covered for both. In the
serial case it needs to kick stuff out of PCI D3 mostly and could
probably be fudged but if USB needs it perhaps it should be explicit.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/