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[76.102.12.149]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2bd7dbe78b9sm863847eec.18.2026.02.20.22.23.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Feb 2026 22:23:32 -0800 (PST) Date: Fri, 20 Feb 2026 22:23:32 -0800 From: Stanislav Fomichev To: I Viswanath Cc: Jakub Kicinski , Jiayuan Chen , netdev@vger.kernel.org, Jiayuan Chen , syzbot+2b3391f44313b3983e91@syzkaller.appspotmail.com, "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Sabrina Dubroca , Stanislav Fomichev , Kuniyuki Iwashima , Samiullah Khawaja , Ahmed Zaki , Alexander Lobakin , Willem de Bruijn , linux-kernel@vger.kernel.org Subject: Re: [PATCH net v1] net: defer __dev_set_promiscuity() to avoid sleeping in atomic context Message-ID: References: <20260214033859.43857-1-jiayuan.chen@linux.dev> <20260218174025.2fe593d3@kernel.org> <20260219121213.5b5ab0e7@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On 02/21, I Viswanath wrote: > On Sat, 21 Feb 2026 at 06:45, Stanislav Fomichev wrote: > > > Do you mean rtnl_lock when you say instance lock? > > > > Search for the instance locks in Documentation/networking/netdevices.rst. We > > essentially need to add netdev_ops_assert_locked to __dev_set_rx_mode > > and make it work. > > So, the handler should look something like this? > > static void netif_write_rx_mode(struct work_struct *param) { > rtnl_lock() > netdev_lock() > /* Processing */ > netdev_unlock(); > rtnl_unlock(); > } > > v9 should be out by next week and fixes all the issues I could think > of so please wait for that Let's handle instance locking separately, I don't think it's as simple as adding netdev_ops_lock/unlock.