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[2a02:3100:a128:aa01:297a:7094:853e:a20c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a18bf31b83sm38426495e9.12.2026.10.09.00.30.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Oct 2026 00:30:38 -0700 (PDT) Date: Fri, 9 Oct 2026 09:30:37 +0200 From: Karl Mehltretter To: Arend van Spriel Cc: linux-wireless@vger.kernel.org, Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt , "David S . Miller" , Eric Dumazet , brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, stable@vger.kernel.org Subject: Re: [PATCH] wifi: brcmfmac: avoid sleeping tx locks in netpoll context Message-ID: References: <20260930185417.61865-1-kmehltretter@gmail.com> <20261004122910.1392318-1-arend.vanspriel@broadcom.com> <802a092a-314a-4f77-aa1d-134b3d020069@broadcom.com> Precedence: bulk X-Mailing-List: linux-rt-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <802a092a-314a-4f77-aa1d-134b3d020069@broadcom.com> On Tue, Oct 06, 2026 at 10:27:27AM +0100, Arend van Spriel wrote: > > > > Lockdep instrumentation in fcmode=1 and 2 confirmed that cleanup enters > > without txq_lock. > > This is an observation unrelated to the patch, right? You mentioned in the > patch it only covers fcmode=0, right? > Yes, the cleanup observation is unrelated to the fcmode=0 fix. I mentioned it to explain why I kept brcmu_pktq_penq() for normal calls. I'm looking at a separate brcmfmac FWS-path RT/netpoll fix for modes 1 and 2. The prototype defers IRQ-disabled transmit to the FWS worker. Are modes 1 and 2 used or recommended on SDIO devices? That would help me prioritise the follow-up. Thanks, Karl