netdev - Re: [PATCH net] bnx2x: fix napi API usage sequence

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Date:   Thu, 28 Apr 2022 01:00:12 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Manish Chopra <manishc@...vell.com>
Cc:     kuba@...nel.org, drc@...ux.vnet.ibm.com, netdev@...r.kernel.org,
        aelior@...vell.com, davem@...emloft.net
Subject: Re: [PATCH net] bnx2x: fix napi API usage sequence

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Tue, 26 Apr 2022 08:39:13 -0700 you wrote:
> While handling PCI errors (AER flow) driver tries to
> disable NAPI [napi_disable()] after NAPI is deleted
> [__netif_napi_del()] which causes unexpected system
> hang/crash.
> 
> System message log shows the following:
> =======================================
> [ 3222.537510] EEH: Detected PCI bus error on PHB#384-PE#800000 [ 3222.537511] EEH: This PCI device has failed 2 times in the last hour and will be permanently disabled after 5 failures.
> [ 3222.537512] EEH: Notify device drivers to shutdown [ 3222.537513] EEH: Beginning: 'error_detected(IO frozen)'
> [ 3222.537514] EEH: PE#800000 (PCI 0384:80:00.0): Invoking
> bnx2x->error_detected(IO frozen)
> [ 3222.537516] bnx2x: [bnx2x_io_error_detected:14236(eth14)]IO error detected [ 3222.537650] EEH: PE#800000 (PCI 0384:80:00.0): bnx2x driver reports:
> 'need reset'
> [ 3222.537651] EEH: PE#800000 (PCI 0384:80:00.1): Invoking
> bnx2x->error_detected(IO frozen)
> [ 3222.537651] bnx2x: [bnx2x_io_error_detected:14236(eth13)]IO error detected [ 3222.537729] EEH: PE#800000 (PCI 0384:80:00.1): bnx2x driver reports:
> 'need reset'
> [ 3222.537729] EEH: Finished:'error_detected(IO frozen)' with aggregate recovery state:'need reset'
> [ 3222.537890] EEH: Collect temporary log [ 3222.583481] EEH: of node=0384:80:00.0 [ 3222.583519] EEH: PCI device/vendor: 168e14e4 [ 3222.583557] EEH: PCI cmd/status register: 00100140 [ 3222.583557] EEH: PCI-E capabilities and status follow:
> [ 3222.583744] EEH: PCI-E 00: 00020010 012c8da2 00095d5e 00455c82 [ 3222.583892] EEH: PCI-E 10: 10820000 00000000 00000000 00000000 [ 3222.583893] EEH: PCI-E 20: 00000000 [ 3222.583893] EEH: PCI-E AER capability register set follows:
> [ 3222.584079] EEH: PCI-E AER 00: 13c10001 00000000 00000000 00062030 [ 3222.584230] EEH: PCI-E AER 10: 00002000 000031c0 000001e0 00000000 [ 3222.584378] EEH: PCI-E AER 20: 00000000 00000000 00000000 00000000 [ 3222.584416] EEH: PCI-E AER 30: 00000000 00000000 [ 3222.584416] EEH: of node=0384:80:00.1 [ 3222.584454] EEH: PCI device/vendor: 168e14e4 [ 3222.584491] EEH: PCI cmd/status register: 00100140 [ 3222.584492] EEH: PCI-E capabilities and status follow:
> [ 3222.584677] EEH: PCI-E 00: 00020010 012c8da2 00095d5e 00455c82 [ 3222.584825] EEH: PCI-E 10: 10820000 00000000 00000000 00000000 [ 3222.584826] EEH: PCI-E 20: 00000000 [ 3222.584826] EEH: PCI-E AER capability register set follows:
> [ 3222.585011] EEH: PCI-E AER 00: 13c10001 00000000 00000000 00062030 [ 3222.585160] EEH: PCI-E AER 10: 00002000 000031c0 000001e0 00000000 [ 3222.585309] EEH: PCI-E AER 20: 00000000 00000000 00000000 00000000 [ 3222.585347] EEH: PCI-E AER 30: 00000000 00000000 [ 3222.586872] RTAS: event: 5, Type: Platform Error (224), Severity: 2 [ 3222.586873] EEH: Reset without hotplug activity [ 3224.762767] EEH: Beginning: 'slot_reset'
> [ 3224.762770] EEH: PE#800000 (PCI 0384:80:00.0): Invoking
> bnx2x->slot_reset()
> [ 3224.762771] bnx2x: [bnx2x_io_slot_reset:14271(eth14)]IO slot reset initializing...
> [ 3224.762887] bnx2x 0384:80:00.0: enabling device (0140 -> 0142) [ 3224.768157] bnx2x: [bnx2x_io_slot_reset:14287(eth14)]IO slot reset
> --> driver unload
> 
> [...]

Here is the summary with links:
  - [net] bnx2x: fix napi API usage sequence
    https://git.kernel.org/netdev/net/c/af68656d66ed

You are awesome, thank you!
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