netdev - Re: [PATCH net 1/3] bnxt_en: Fix netdev locking in ULP IRQ functions

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Message-ID: <20250520191024.1b92e207@kernel.org>
Date: Tue, 20 May 2025 19:10:24 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Michael Chan <michael.chan@...adcom.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
 pabeni@...hat.com, andrew+netdev@...n.ch, pavan.chebbi@...adcom.com,
 andrew.gospodarek@...adcom.com, Stanislav Fomichev <sdf@...ichev.me>
Subject: Re: [PATCH net 1/3] bnxt_en: Fix netdev locking in ULP IRQ
 functions

On Mon, 19 May 2025 13:41:28 -0700 Michael Chan wrote:
> netdev_lock is already held when calling bnxt_ulp_irq_stop() and
> bnxt_ulp_irq_restart().  When converting rtnl_lock to netdev_lock,
> the original code was rtnl_dereference() to indicate that rtnl_lock
> was already held.  rcu_dereference_protected() is the correct
> conversion after replacing rtnl_lock with netdev_lock.
> 
> Add a new helper netdev_lock_dereference() similar to
> rtnl_dereference().

I'll apply this one as is since its for the current release