netdev - Re: [PATCH net] e100: Fix "disabling already-disabled device" warning

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Date:	Thu, 30 Jan 2014 20:17:15 +0000
From:	"Brown, Aaron F" <aaron.f.brown@...el.com>
To:	"michele@...syn.org" <michele@...syn.org>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"idirectscm@....com" <idirectscm@....com>,
	"davem@...emloft.net" <davem@...emloft.net>
Subject: Re: [PATCH net] e100: Fix "disabling already-disabled device"
 warning

On Thu, 2014-01-30 at 10:51 +0000, Michele Baldessari wrote:
>                              From: 
> Michele Baldessari
> <michele@...syn.org>
>                          Reply-to: 
> Michele Baldessari
> <michele@...syn.org>
>                                To: 
> netdev@...r.kernel.org
>                                Cc: 
> e1000-devel@...ts.sourceforge.net,
> idirectscm@....com, David S. Miller
> <davem@...emloft.net>, Michele
> Baldessari <michele@...syn.org>
>                           Subject: 
> [PATCH net] e100: Fix "disabling
> already-disabled device" warning
>                              Date: 
> Thu, 30 Jan 2014 10:51:04 +0000
> (14-01-30 02:51:04 AM)
> 
> 
> In https://bugzilla.redhat.com/show_bug.cgi?id=994438 and
> https://bugzilla.redhat.com/show_bug.cgi?id=970480  we
> received different reports of e100 throwing the following
> warning:
> 
>  [<c06a0ba5>] ? pci_disable_device+0x85/0x90
>  [<c044a153>] warn_slowpath_fmt+0x33/0x40
>  [<c06a0ba5>] pci_disable_device+0x85/0x90
>  [<f7fdf7e0>] __e100_shutdown+0x80/0x120 [e100]
>  [<c0476ca5>] ? check_preempt_curr+0x65/0x90
>  [<f7fdf8d6>] e100_suspend+0x16/0x30 [e100]
>  [<c06a1ebb>] pci_legacy_suspend+0x2b/0xb0
>  [<c098fc0f>] ? wait_for_completion+0x1f/0xd0
>  [<c06a2d50>] ? pci_pm_poweroff+0xb0/0xb0
>  [<c06a2de4>] pci_pm_freeze+0x94/0xa0
>  [<c0767bb7>] dpm_run_callback+0x37/0x80
>  [<c076a204>] ? pm_wakeup_pending+0xc4/0x140
>  [<c0767f12>] __device_suspend+0xb2/0x1f0
>  [<c076806f>] async_suspend+0x1f/0x90
>  [<c04706e5>] async_run_entry_fn+0x35/0x140
>  [<c0478aef>] ? wake_up_process+0x1f/0x40
>  [<c0464495>] process_one_work+0x115/0x370
>  [<c0462645>] ? start_worker+0x25/0x30
>  [<c0464dc5>] ? manage_workers.isra.27+0x1a5/0x250
>  [<c0464f6e>] worker_thread+0xfe/0x330
>  [<c0464e70>] ? manage_workers.isra.27+0x250/0x250
>  [<c046a224>] kthread+0x94/0xa0
>  [<c0997f37>] ret_from_kernel_thread+0x1b/0x28
>  [<c046a190>] ? insert_kthread_work+0x30/0x30
> 
> This patch removes pci_disable_device() from __e100_shutdown().
> pci_clear_master() is enough.
> 
> Signed-off-by: Michele Baldessari <michele@...syn.org>
> Tested-by: Mark Harig <idirectscm@....com>
Signed-off-by: Aaron Brown <aaron.f.brown@...el.com>
> ---
>  drivers/net/ethernet/intel/e100.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)