linux-kernel - RE: [PATCH net 2/3] r8152: fix remote wakeup

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Date:	Thu, 23 Jul 2015 11:30:30 +0000
From:	Hayes Wang <hayeswang@...ltek.com>
To:	Oliver Neukum <oneukum@...e.com>
CC:	nic_swsd <nic_swsd@...ltek.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH net 2/3] r8152: fix remote wakeup

Oliver Neukum [mailto:oneukum@...e.com]
[...]
> If the device does not support remote wakeup and the driver enables it, runtime
> power management will be switched off.
> That is the current state and it means that devices which don't support remote
> wakeup cannot do runtime power management at all. But the driver is correct.
> 
> The only time a device that doesn't support remote wakeup can do runtime power
> managent is when no packets can be received that is while the interface is down. If
> you want to allow that you must not set needs_remote_wakeup in probe(), but you
> must set it in open() because it is necessary for runtime power management as I
> explained above.
> 
> Sorry for the length of this mail, but I wanted to make sure I am absolutely clear
> this time.

Thanks for you explanation. I focus on the wrong point. You mean this would cause
the problem for runtime suspend. I would rethink my method and correct it.

Best Regards,
Hayes