From nobody Sat Sep 26 10:03:32 2026 Received: from mail-m49198.qiye.163.com (mail-m49198.qiye.163.com [45.254.49.198]) (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 F1ED4390239; Wed, 2 Sep 2026 14:09:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.254.49.198 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788358185; cv=none; b=s+qFpmzjh6FwhS/LS961IQ5dQemFJUgqSv+6MVUXqPn2Ep2qHStvlD+7yRdKrfjEpxA7d/1id7gRNwdNX7/nJ+dmivtzLHM7/+4RaUKPN7zIHHswM9MtpSIZ4WmTLSuNtUrwLuZfusMAFh4vlnPBc8EDFElhweJ61lEBAYLbNVI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788358185; c=relaxed/simple; bh=hwznEtLz9at2KrCUuawHk7lHioFcA3JjBccZlI0G948=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=RVR1f0oEnxYAUMsVXY6BWnnUwMz49Zc7NAPCTWbkUnRiU/xrdw8QeIttjSZhBJ+Ech7Z9sKLpi9IEZNcXOcM0FXFz+m1M9NbJPzJdKYjeoaaBUIVJmyRuufpw/RTnoibHW6YpyRLF6BWJSVzWRwdj2/YSTci9EdVaajtzT/JwKE= 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=STnxJlrY; arc=none smtp.client-ip=45.254.49.198 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="STnxJlrY" Received: from PC-202605011814.localdomain (unknown [58.241.16.34]) by smtp.qiye.163.com (Hmail) with ESMTP id 4c47d4e66; Wed, 2 Sep 2026 22:09:34 +0800 (GMT+08:00) From: Runyu Xiao To: Ulf Hansson Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Runyu Xiao , Jianhao Xu Subject: [PATCH] mmc: sh_mmcif: initialize IRQ-thread mutex before requesting interrupt Date: Wed, 2 Sep 2026 22:09:26 +0800 Message-Id: <20260902140926.3576781-1-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: 0aa06274269103a1kunmc427f4561ad27c X-HM-MType: 10 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVkZH0wfVh8aH08fSh0ZQ0JDT1YeHw 5VEwETFhoSFyQUDg9ZV1kYEgtZQVlOQ1VJT0pVSk1VSE9ZV1kWGg8SFR0UWUFZT0tIVUpLSEpPSE xVSktLVUpCS0tZBg++ DKIM-Signature: a=rsa-sha256; b=STnxJlrYaprVQet6E8MpyhvyWvOQRi7r7aEZY5pMAw1sP1Raw/frzxfzu5UWKA6sBE+zY8qiFR2ev/Rvu1TqhN9g9arf6c9yb4kFVn9hPINnTDZN3J+NyqcGG3EggICdQTLS+cuuxbiUDVC20baLnHOxX0c/CfVa0yHphH1xAWM=; s=default; c=relaxed/relaxed; d=seu.edu.cn; v=1; bh=gyRX29A6v4W3vpaMus1y6buRgYO80vg2lKvJYVXDFcE=; h=date:mime-version:subject:message-id:from; Content-Type: text/plain; charset="utf-8" The threaded IRQ handler can run before devm_request_threaded_irq() returns, but thread_lock was initialized afterwards. Initialize it before requesting either interrupt. Fixes: 8047310ee984 ("mmc: sh_mmcif: fix a race, causing an Oops on SMP") Cc: stable@vger.kernel.org Assisted-by: Codex:GPT-5 Signed-off-by: Runyu Xiao --- drivers/mmc/host/sh_mmcif.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c index 7706d01b1..8bd9cdeda 100644 --- a/drivers/mmc/host/sh_mmcif.c +++ b/drivers/mmc/host/sh_mmcif.c @@ -1461,6 +1461,7 @@ static int sh_mmcif_probe(struct platform_device *pde= v) host->pd =3D pdev; =20 spin_lock_init(&host->lock); + mutex_init(&host->thread_lock); =20 mmc->ops =3D &sh_mmcif_ops; sh_mmcif_init_ocr(host); @@ -1515,8 +1516,6 @@ static int sh_mmcif_probe(struct platform_device *pde= v) goto err_clk; } =20 - mutex_init(&host->thread_lock); - ret =3D mmc_add_host(mmc); if (ret < 0) goto err_clk; --=20 2.34.1