netdev - Re: [net-next PATCH 1/2] igbvf: add new driver to support 82576 virtual functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 18 Mar 2009 14:53:40 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alexander Duyck <alexander.h.duyck@...el.com>
Cc:	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"gospo@...hat.com" <gospo@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"greg@...ah.com" <greg@...ah.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"Zhao, Yu" <yu.zhao@...el.com>
Subject: Re: [net-next PATCH 1/2] igbvf: add new driver to support 82576
 virtual functions

On Wed, 18 Mar 2009 08:22:46 -0700 Alexander Duyck <alexander.h.duyck@...el.com> wrote:

> >>>> +static int igbvf_set_ringparam(struct net_device *netdev,
> >>>> +                               struct ethtool_ringparam *ring)
> >>>> +{
> >>>> +     struct igbvf_adapter *adapter = netdev_priv(netdev);
> >>>> +     struct igbvf_ring *tx_ring, *tx_old;
> >>>> +     struct igbvf_ring *rx_ring, *rx_old;
> >>>> +     int err;
> >>>> +
> >>>> +     if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
> >>>> +             return -EINVAL;
> >>>> +
> >>>> +     while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
> >>>> +             msleep(1);
> >>> No timeout needed here?  Interrupts might not be working, for example..
> >> This bit isn't set in interrupt context.  This is always used out of 
> >> interrupt context and is just to prevent multiple setting changes at the 
> >> same time.
> > 
> > Oh.  Can't use plain old mutex_lock()?
> 
> We have one or two spots that actually check to see if the bit is set 
> and just report a warning instead of actually waiting on the bit to clear.

mutex_is_locked()?
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html