netdev - Re: [PATCH net-next] net: ethernet: mtk_wed: fix sleep while atomic in mtk_wed_wo_queue

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Date:   Sat, 03 Dec 2022 05:50:24 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     netdev@...r.kernel.org, nbd@....name, john@...ozen.org,
        sean.wang@...iatek.com, Mark-MC.Lee@...iatek.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, matthias.bgg@...il.com,
        linux-mediatek@...ts.infradead.org, lorenzo.bianconi@...hat.com
Subject: Re: [PATCH net-next] net: ethernet: mtk_wed: fix sleep while atomic in
 mtk_wed_wo_queue_refill

Hello:

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

On Thu,  1 Dec 2022 16:26:53 +0100 you wrote:
> In order to fix the following sleep while atomic bug always alloc pages
> with GFP_ATOMIC in mtk_wed_wo_queue_refill since page_frag_alloc runs in
> spin_lock critical section.
> 
> [    9.049719] Hardware name: MediaTek MT7986a RFB (DT)
> [    9.054665] Call trace:
> [    9.057096]  dump_backtrace+0x0/0x154
> [    9.060751]  show_stack+0x14/0x1c
> [    9.064052]  dump_stack_lvl+0x64/0x7c
> [    9.067702]  dump_stack+0x14/0x2c
> [    9.071001]  ___might_sleep+0xec/0x120
> [    9.074736]  __might_sleep+0x4c/0x9c
> [    9.078296]  __alloc_pages+0x184/0x2e4
> [    9.082030]  page_frag_alloc_align+0x98/0x1ac
> [    9.086369]  mtk_wed_wo_queue_refill+0x134/0x234
> [    9.090974]  mtk_wed_wo_init+0x174/0x2c0
> [    9.094881]  mtk_wed_attach+0x7c8/0x7e0
> [    9.098701]  mt7915_mmio_wed_init+0x1f0/0x3a0 [mt7915e]
> [    9.103940]  mt7915_pci_probe+0xec/0x3bc [mt7915e]
> [    9.108727]  pci_device_probe+0xac/0x13c
> [    9.112638]  really_probe.part.0+0x98/0x2f4
> [    9.116807]  __driver_probe_device+0x94/0x13c
> [    9.121147]  driver_probe_device+0x40/0x114
> [    9.125314]  __driver_attach+0x7c/0x180
> [    9.129133]  bus_for_each_dev+0x5c/0x90
> [    9.132953]  driver_attach+0x20/0x2c
> [    9.136513]  bus_add_driver+0x104/0x1fc
> [    9.140333]  driver_register+0x74/0x120
> [    9.144153]  __pci_register_driver+0x40/0x50
> [    9.148407]  mt7915_init+0x5c/0x1000 [mt7915e]
> [    9.152848]  do_one_initcall+0x40/0x25c
> [    9.156669]  do_init_module+0x44/0x230
> [    9.160403]  load_module+0x1f30/0x2750
> [    9.164135]  __do_sys_init_module+0x150/0x200
> [    9.168475]  __arm64_sys_init_module+0x18/0x20
> [    9.172901]  invoke_syscall.constprop.0+0x4c/0xe0
> [    9.177589]  do_el0_svc+0x48/0xe0
> [    9.180889]  el0_svc+0x14/0x50
> [    9.183929]  el0t_64_sync_handler+0x9c/0x120
> [    9.188183]  el0t_64_sync+0x158/0x15c
> 
> [...]

Here is the summary with links:
  - [net-next] net: ethernet: mtk_wed: fix sleep while atomic in mtk_wed_wo_queue_refill
    https://git.kernel.org/netdev/net-next/c/65e6af6cebef

You are awesome, thank you!
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