netdev - RE: [Intel-wired-lan] [PATCH net v2] igb: fix hang issue of AER error during resume

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Message-ID: <CO1PR11MB5028DD73CD9601FEA281FC0DA037A@CO1PR11MB5028.namprd11.prod.outlook.com>
Date: Thu, 13 Jul 2023 23:38:33 +0000
From: "Mekala, SunithaX D" <sunithax.d.mekala@...el.com>
To: "Ma, Aaron" <aaron.ma@...onical.com>, "Brandeburg, Jesse"
	<jesse.brandeburg@...el.com>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>, "David S. Miller" <davem@...emloft.net>, "Eric
 Dumazet" <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Jeff Garzik <jgarzik@...hat.com>, Auke Kok
	<auke-jan.h.kok@...el.com>, "intel-wired-lan@...ts.osuosl.org"
	<intel-wired-lan@...ts.osuosl.org>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH net v2] igb: fix hang issue of AER error
 during resume

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Aaron Ma
> Sent: Tuesday, June 6, 2023 6:57 PM
> To: Brandeburg, Jesse <jesse.brandeburg@...el.com>; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; David S. Miller <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; Jeff Garzik <jgarzik@...hat.com>; Auke Kok <auke-jan.h.kok@...el.com>; intel-wired-lan@...ts.osuosl.org; netdev@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [Intel-wired-lan] [PATCH net v2] igb: fix hang issue of AER error during resume
>
> PCIe AER error_detected caused a race issue with igb_resume.
> Protect error_detected when igb is in down state.
>
> Error logs:
> kernel: igb 0000:02:00.0: disabling already-disabled device
> kernel: WARNING: CPU: 0 PID: 277 at drivers/pci/pci.c:2248 pci_disable_device+0xc4/0xf0
> kernel: RIP: 0010:pci_disable_device+0xc4/0xf0
> kernel: Call Trace:
> kernel:  <TASK>
> kernel:  igb_io_error_detected+0x3e/0x60
> kernel:  report_error_detected+0xd6/0x1c0
> kernel:  ? __pfx_report_normal_detected+0x10/0x10
> kernel:  report_normal_detected+0x16/0x30
> kernel:  pci_walk_bus+0x74/0xa0
> kernel:  pcie_do_recovery+0xb9/0x340
> kernel:  ? __pfx_aer_root_reset+0x10/0x10
> kernel:  aer_process_err_devices+0x168/0x220
> kernel:  aer_isr+0x1b5/0x1e0
> kernel:  ? __pfx_irq_thread_fn+0x10/0x10
> kernel:  irq_thread_fn+0x21/0x70
> kernel:  irq_thread+0xf8/0x1c0
> kernel:  ? __pfx_irq_thread_dtor+0x10/0x10
> kernel:  ? __pfx_irq_thread+0x10/0x10
> kernel:  kthread+0xef/0x120
> kernel:  ? __pfx_kthread+0x10/0x10
> kernel:  ret_from_fork+0x29/0x50
> kernel:  </TASK>
> kernel: ---[ end trace 0000000000000000 ]---
>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=217446
> Fixes: 9d5c824399de ("igb: PCI-Express 82575 Gigabit Ethernet driver")
> Signed-off-by: Aaron Ma <aaron.ma@...onical.com>
> Reviewed-by: Mateusz Palczewski <mateusz.palczewski@...el.com>
> ---
> V1->V2: Add target tree tag net and Fixes tag.
>
>  drivers/net/ethernet/intel/igb/igb_main.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
>
Tested-by: Sunitha Mekala <sunithax.d.mekala@...el.com> (A Contingent worker at Intel)