[PATCH net v6] net: dsa: mt7530: fix .get_stats64 sleeping in atomic context

[patchwork-bot+netdevbpf at kernel.org]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba at kernel.org>:

On Sat, 2 May 2026 11:55:02 +0100 you wrote:
> The .get_stats64 callback runs in atomic context, but on
> MDIO-connected switches every register read acquires the MDIO bus
> mutex, which can sleep:
> [   12.645973] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:609
> [   12.654442] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 759, name: grep
> [   12.663377] preempt_count: 0, expected: 0
> [   12.667410] RCU nest depth: 1, expected: 0
> [   12.671511] INFO: lockdep is turned off.
> [   12.675441] CPU: 0 UID: 0 PID: 759 Comm: grep Tainted: G S      W           7.0.0+ #0 PREEMPT
> [   12.675453] Tainted: [S]=CPU_OUT_OF_SPEC, [W]=WARN
> [   12.675456] Hardware name: Bananapi BPI-R64 (DT)
> [   12.675459] Call trace:
> [   12.675462]  show_stack+0x14/0x1c (C)
> [   12.675477]  dump_stack_lvl+0x68/0x8c
> [   12.675487]  dump_stack+0x14/0x1c
> [   12.675495]  __might_resched+0x14c/0x220
> [   12.675504]  __might_sleep+0x44/0x80
> [   12.675511]  __mutex_lock+0x50/0xb10
> [   12.675523]  mutex_lock_nested+0x20/0x30
> [   12.675532]  mt7530_get_stats64+0x40/0x2ac
> [   12.675542]  dsa_user_get_stats64+0x2c/0x40
> [   12.675553]  dev_get_stats+0x44/0x1e0
> [   12.675564]  dev_seq_printf_stats+0x24/0xe0
> [   12.675575]  dev_seq_show+0x14/0x3c
> [   12.675583]  seq_read_iter+0x37c/0x480
> [   12.675595]  seq_read+0xd0/0xec
> [   12.675605]  proc_reg_read+0x94/0xe4
> [   12.675615]  vfs_read+0x98/0x29c
> [   12.675625]  ksys_read+0x54/0xdc
> [   12.675633]  __arm64_sys_read+0x18/0x20
> [   12.675642]  invoke_syscall.constprop.0+0x54/0xec
> [   12.675653]  do_el0_svc+0x3c/0xb4
> [   12.675662]  el0_svc+0x38/0x200
> [   12.675670]  el0t_64_sync_handler+0x98/0xdc
> [   12.675679]  el0t_64_sync+0x158/0x15c
> 
> [...]

Here is the summary with links:
  - [net,v6] net: dsa: mt7530: fix .get_stats64 sleeping in atomic context
    https://git.kernel.org/netdev/net/c/07d995873960

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html