From nobody Sat Sep 26 21:14:49 2026 Received: from mail-m155101.qiye.163.com (mail-m155101.qiye.163.com [101.71.155.101]) (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 188721E1A3D; Sun, 30 Aug 2026 06:04:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=101.71.155.101 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788069876; cv=none; b=gJEUH/7Jv5ZXLu7sc07kt3akR2H5jk0qqW4EuE8wnBJp2JpGTXfe1UoALAeKAI7Kow7tSaUkxiL3bjYiVkBRoIKpKQebxO99L0JbMlE/yc48ratJLwieS0IDzmQKE7uQEAxMlizdc7so5Ks46dPy9YMu6XEIlpVVHuVezn2WDZI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788069876; c=relaxed/simple; bh=xo1dMyg+/Rd5ThGZUqqfd+WM/Q7yVLItecLF3QdgL8Q=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=evkGkJ7C8AS5N503JtTUQE9In+XMLnVU4G8puFkcTMjsurrqiCs/d0jN2Xu4X7jSo2lo1PPWaCLHbzsJIYOhZG3F46NMUzYmVzi7KONSs0mn6samhVaL51VSac1hS0lfLksFWIDQRPgE/laaRlrwfC8FsKPZRK3VxtDoPvceE0Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=seu.edu.cn; spf=pass smtp.mailfrom=seu.edu.cn; dkim=pass (1024-bit key) header.d=seu.edu.cn header.i=@seu.edu.cn header.b=MAHrKP+b; arc=none smtp.client-ip=101.71.155.101 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=seu.edu.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=seu.edu.cn Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=seu.edu.cn header.i=@seu.edu.cn header.b="MAHrKP+b" Received: from PC-202605011814.localdomain (unknown [58.241.16.34]) by smtp.qiye.163.com (Hmail) with ESMTP id 4bd37c65a; Sun, 30 Aug 2026 14:04:27 +0800 (GMT+08:00) From: Runyu Xiao To: vkoul@kernel.org Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, runyu.xiao@seu.edu.cn, jianhao.xu@seu.edu.cn Subject: [PATCH] dmaengine: mediatek: initialize tasklets before requesting IRQs Date: Sun, 30 Aug 2026 14:04:22 +0800 Message-Id: <20260830060422.2204459-1-runyu.xiao@seu.edu.cn> X-Mailer: git-send-email 2.34.1 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 X-HM-Tid: 0aa05144ef1b03a1kunm1ce9fc29f1215 X-HM-MType: 10 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVlDHR9KVhhKTU1OHhhLHhgaTlYeHw 5VEwETFhoSFyQUDg9ZV1kYEgtZQVlOQ1VJT0pVSk1VSE9ZV1kWGg8SFR0UWUFZT0tIVUpLSEpPSE xVSktLVUpCS0tZBg++ DKIM-Signature: a=rsa-sha256; b=MAHrKP+bvsVpW3fN+Ty/oTRyRsGZp0Z0QLt0ZTL5mTVkcarHO9dcuaxXk79N07DhQJWWn4HIYvNAsyUJYB/0mQOTd2BOk61CftNUpjSUo08FMAaErzuO8VQT44L35H2UHvjd2SZDCFNcnobcpKooxV2U4KCIx2cQOSzesLl5wQQ=; s=default; c=relaxed/relaxed; d=seu.edu.cn; v=1; bh=i7KZYx3u2m5meljaWToLKg2o1Rh8mtUpTkTyuFW8LYE=; h=date:mime-version:subject:message-id:from; Content-Type: text/plain; charset="utf-8" The CQDMA probe registers each physical-channel IRQ before initializing the tasklet scheduled by the interrupt handler. A pending interrupt can schedule an uninitialized tasklet while probe is still running. Initialize each tasklet when its physical channel is allocated, before registering the corresponding IRQ. Fixes: b1f01e48df5a ("dmaengine: Add MediaTek Command-Queue DMA controller = for MT6765 SoC") Cc: stable@vger.kernel.org Assisted-by: Codex:GPT-5 Signed-off-by: Runyu Xiao --- drivers/dma/mediatek/mtk-cqdma.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cq= dma.c index 80791e30a..8038f14d1 100644 --- a/drivers/dma/mediatek/mtk-cqdma.c +++ b/drivers/dma/mediatek/mtk-cqdma.c @@ -815,6 +815,7 @@ static int mtk_cqdma_probe(struct platform_device *pdev) INIT_LIST_HEAD(&cqdma->pc[i]->queue); spin_lock_init(&cqdma->pc[i]->lock); refcount_set(&cqdma->pc[i]->refcnt, 0); + tasklet_setup(&cqdma->pc[i]->tasklet, mtk_cqdma_tasklet_cb); cqdma->pc[i]->base =3D devm_platform_ioremap_resource(pdev, i); if (IS_ERR(cqdma->pc[i]->base)) return PTR_ERR(cqdma->pc[i]->base); @@ -869,10 +870,6 @@ static int mtk_cqdma_probe(struct platform_device *pde= v) =20 platform_set_drvdata(pdev, cqdma); =20 - /* initialize tasklet for each PC */ - for (i =3D 0; i < cqdma->dma_channels; ++i) - tasklet_setup(&cqdma->pc[i]->tasklet, mtk_cqdma_tasklet_cb); - dev_info(&pdev->dev, "MediaTek CQDMA driver registered\n"); =20 return 0; --=20 2.34.1