linux-kernel - Re: [PATCH net v2 2/2] r8152: reset device when tx timeout

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Message-ID: <1438088317.1787.5.camel@suse.com>
Date:	Tue, 28 Jul 2015 14:58:37 +0200
From:	Oliver Neukum <oneukum@...e.com>
To:	Hayes Wang <hayeswang@...ltek.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	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>
Subject: Re: [PATCH net v2 2/2] r8152: reset device when tx timeout

On Tue, 2015-07-28 at 12:31 +0000, Hayes Wang wrote:
> Oliver Neukum [mailto:oneukum@...e.com]
> > Sent: Tuesday, July 28, 2015 8:14 PM
> [...]
> > >  static void rtl8152_tx_timeout(struct net_device *netdev)  {
> > >         struct r8152 *tp = netdev_priv(netdev);
> > > -       int i;
> > >
> > >         netif_warn(tp, tx_err, netdev, "Tx timeout\n");
> > > -       for (i = 0; i < RTL8152_MAX_TX; i++)
> > > -               usb_unlink_urb(tp->tx_info[i].urb);
> > > +
> > > +       usb_queue_reset_device(tp->intf);
> > > +       cancel_delayed_work(&tp->schedule);
> > 
> > Sorry to bother you again, but this looks wrong.
> > You want to cancel first. There is no point in running any work before the reset is
> > done. It will undo any progress anyway.
> 
> Excuse me. Do you mean I don't need cancel the other work because it wouldn't be
> run before the reset is finished?

No, whatever the other work will do, the reset will undo.

	Regards
		Oliver


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