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Mon, 22 Dec 2025 12:16:24 -0800 (PST) From: "Ionut Nechita (WindRiver)" X-Google-Original-From: "Ionut Nechita (WindRiver)" To: ming.lei@redhat.com Cc: axboe@kernel.dk, gregkh@linuxfoundation.org, ionut.nechita@windriver.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, muchun.song@linux.dev, sashal@kernel.org, stable@vger.kernel.org Subject: [PATCH v2 2/2] block: Fix WARN_ON in blk_mq_run_hw_queue when called from interrupt context Date: Mon, 22 Dec 2025 22:15:41 +0200 Message-ID: <20251222201541.11961-3-ionut.nechita@windriver.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251222201541.11961-1-ionut.nechita@windriver.com> References: <20251222201541.11961-1-ionut.nechita@windriver.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ionut Nechita Fix warning "WARN_ON_ONCE(!async && in_interrupt())" that occurs during SCSI device scanning when blk_freeze_queue_start() calls blk_mq_run_hw_queu= es() synchronously from interrupt context. The issue happens during device removal/scanning when: 1. blk_mq_destroy_queue() -> blk_queue_start_drain() 2. blk_freeze_queue_start() calls blk_mq_run_hw_queues(q, false) 3. This triggers the warning in blk_mq_run_hw_queue() when in interrupt con= text Change the synchronous call to asynchronous to avoid running in interrupt c= ontext. Fixes: Warning in blk_mq_run_hw_queue+0x1fa/0x260 Signed-off-by: Ionut Nechita --- block/blk-mq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 5fb8da4958d0..ae152f7a6933 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -128,7 +128,7 @@ void blk_freeze_queue_start(struct request_queue *q) percpu_ref_kill(&q->q_usage_counter); mutex_unlock(&q->mq_freeze_lock); if (queue_is_mq(q)) - blk_mq_run_hw_queues(q, false); + blk_mq_run_hw_queues(q, true); } else { mutex_unlock(&q->mq_freeze_lock); } --=20 2.52.0