Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8EC9A4B8265 for ; Wed, 16 Sep 2026 16:48:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789577340; cv=none; b=hmyIYIvjdGUJrENQHoGjXo7phBCOGyfKoQHOw57xqVfntao2QdTtA2HteS0hu8pFN9MG/uRMMdKzAMQ9hBNzFiLNdP7iAsXaGZmHRmd3MQt0oW/G/5RlWwbeidHfwLgLLivrat5WjHSPXNwLn+0jVjyj3fqEQllJo/auk0OXZNo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789577340; c=relaxed/simple; bh=S/FWPnEZMzRiu83r+fOcewMV9IyR4rbu8ueiMJQrszw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dXaV08T/37AHOTMvzGdYrsEkYOZBSvO8BIUBcw78p61sIsD/Fanyl5nauIsPzc5ABuPiNxj3y4/fEMwxmfrWJCksTcv7i7OHCeuesszSad22A85XUWdivLXMgZFZhGbF96chaVkmwCxi+M+uZP4JaHY1Fm4/63q621nrR10u0VA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EaO+jUih; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EaO+jUih" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C1B71F0089F; Wed, 16 Sep 2026 16:48:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789577331; bh=qf4rY7brb6DTMGp6vMXcEIQc/yjgI7kh66DjeA8g7A0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=EaO+jUihnC1bdKB1/UnD2V248vbxrfwItU1cMfsEs8Mi4mWJ0KK5yOc63l8pSbx5A 8w15YzQ09YFy4ZuVzrC4u/spJti1C29yNaQZnP7K/iyEJiZuil+HixdzhdNqlOFxHR 5sYwe6pVtdVrkV049gAgP+pYsPPsBivtbjqarnaunLYWLa68J2u/Av5OthLyYPq8tQ b8w8N5WaZjRPcBolYAv/jd6Sd5LRKgGFyCueUzPeQ0xWICwjX8cj+8TtYxrC2mDBdS O41gW3b2lYxNbmprTLQXhTSXyPjSpEzj9FHhU7O5FSm3jYQABtX6gOHhXtIK5/ExT7 KiOFJISqIEvsg== From: Sasha Levin To: stable@vger.kernel.org Cc: Xiong Weimin , "Michael S. Tsirkin" , Sasha Levin Subject: [PATCH 6.6.y 2/2] virtio_mmio: disable IRQ wake before free_irq Date: Wed, 16 Sep 2026 12:48:48 -0400 Message-ID: <20260916164848.542476-2-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260916164848.542476-1-sashal@kernel.org> References: <2026091637-greeting-apple-1005@gregkh> <20260916164848.542476-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Xiong Weimin [ Upstream commit d14d693adb055e98ca705822ba6daebc18602d9a ] When the DT node has "wakeup-source", vm_find_vqs() calls enable_irq_wake() on the shared IRQ, but vm_del_vqs() freed that IRQ without a matching disable_irq_wake(). That leaves a wake reference behind and can warn on later free_irq()/request_irq() cycles. Record whether enable_irq_wake() succeeded, and disable it in vm_del_vqs() before free_irq(). Fixes: 02213273f72a ("virtio_mmio: add support to set IRQ of a virtio device as wakeup source") Cc: stable@vger.kernel.org Signed-off-by: Xiong Weimin Signed-off-by: Michael S. Tsirkin Message-ID: <20260805032937.1606737-1-xiongweimin@kylinos.cn> Signed-off-by: Sasha Levin --- drivers/virtio/virtio_mmio.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index 33da642ea962a..649e9d5aa1329 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -87,6 +87,9 @@ struct virtio_mmio_device { void __iomem *base; unsigned long version; + + /* True if enable_irq_wake() succeeded for the shared IRQ. */ + bool wake_irq_enabled; }; /* Configuration interface */ @@ -329,11 +332,17 @@ static void vm_del_vqs(struct virtio_device *vdev) { struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev); struct virtqueue *vq, *n; + int irq = platform_get_irq(vm_dev->pdev, 0); list_for_each_entry_safe(vq, n, &vdev->vqs, list) vm_del_vq(vq); - free_irq(platform_get_irq(vm_dev->pdev, 0), vm_dev); + if (vm_dev->wake_irq_enabled) { + disable_irq_wake(irq); + vm_dev->wake_irq_enabled = false; + } + + free_irq(irq, vm_dev); } static void vm_synchronize_cbs(struct virtio_device *vdev) @@ -462,8 +471,9 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned int nvqs, if (err) return err; - if (of_property_read_bool(vm_dev->pdev->dev.of_node, "wakeup-source")) - enable_irq_wake(irq); + if (of_property_read_bool(vm_dev->pdev->dev.of_node, "wakeup-source") && + !enable_irq_wake(irq)) + vm_dev->wake_irq_enabled = true; for (i = 0; i < nvqs; ++i) { if (!names[i]) { -- 2.53.0