From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (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 34F2451033 for ; Mon, 19 Feb 2024 19:58:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708372699; cv=none; b=eNxv+LJR1iUxqapVgr5+vO3EdQM/FSUw3sG4RJ3CRbq9RBkg2PdXPHDgL66Gn5uemNWnS0mYF5uv00oawQXUZGPSsb1kCi6Tk9/QMEhNtfx4fRzrG/RO3qUXjMWVOobV2f/YbouJWCKfnzdSlfCmrGILUX0ruJ5cMvIQ4PRWcBw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708372699; c=relaxed/simple; bh=TquE1dW+qm+nVtngnRKRNtP2lZTiAhrMZ6Ch/QG2DI4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=rQtbnXSOQybKUj6K2A57OAiFQ6fF4xFUAiBUeWrpjRHVzvwiWCi+3DhOjp3wix2ZnB3xiXqdkxjVpqHKnp53QjARKfYBzmqj0UdnO4jKQiSB94vmmSca5ukag3YCdsXg9PgTs6c6xP80sU4OlMkrm5nK9w0PFGEGSIcP6b+W4Xg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=h36kLlcW; arc=none smtp.client-ip=198.175.65.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="h36kLlcW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1708372698; x=1739908698; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=TquE1dW+qm+nVtngnRKRNtP2lZTiAhrMZ6Ch/QG2DI4=; b=h36kLlcWT41Km2bnHbnqIMtkxibn6hWt5bUK+lgwpv6gr0woKlY5XHqu 4q1fE/qYTAy8tBnmtNDFX07/cbHtvLNEi/BjL3fc3JwpGs3R91LlUsSFm kJZtaSFUlEzzmJw/cd6Y9MhyfVp0dx0n1PuBl15hKa+Y0KSVHOOMZ8KkH 0CLPmiXvFe7x7exa57/TTWRdclapNwT9SXdr/TUXkfdPv+7zDAR1XE95N zOABs5e4HnWJvezLgTzXoBXxuXTF+4hY8NlL4F9CEeTdII6S6sONYG71X BJvMLIxDxymIk7QXFdUXa6BXCel4mEtW2jCzj9l91z6JqpEEeNDa9cCFP Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10989"; a="19893439" X-IronPort-AV: E=Sophos;i="6.06,170,1705392000"; d="scan'208";a="19893439" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Feb 2024 11:58:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,170,1705392000"; d="scan'208";a="9239476" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Feb 2024 11:58:14 -0800 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 1BC0611F855; Mon, 19 Feb 2024 21:58:08 +0200 (EET) From: Sakari Ailus To: linux-kernel@vger.kernel.org Cc: Hans de Goede , Tomas Winkler , Wentong Wu , Arnd Bergmann , Greg Kroah-Hartman Subject: [PATCH v2 1/3] mei: vsc: Call wake_up() in the threaded IRQ handler Date: Mon, 19 Feb 2024 21:58:05 +0200 Message-Id: <20240219195807.517742-2-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240219195807.517742-1-sakari.ailus@linux.intel.com> References: <20240219195807.517742-1-sakari.ailus@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The hard IRQ handler vsc_tp_irq() is called with a raw spinlock taken. wake_up() acquires a spinlock, a sleeping lock on PREEMPT_RT. This leads to sleeping in atomic context. Move the wake_up() call to the threaded IRQ handler vsc_tp_thread_isr() where it can be safely called. Fixes: 566f5ca97680 ("mei: Add transport driver for IVSC device") Signed-off-by: Sakari Ailus --- drivers/misc/mei/vsc-tp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/misc/mei/vsc-tp.c b/drivers/misc/mei/vsc-tp.c index 6f4a4be6ccb5..2b69ada9349e 100644 --- a/drivers/misc/mei/vsc-tp.c +++ b/drivers/misc/mei/vsc-tp.c @@ -416,8 +416,6 @@ static irqreturn_t vsc_tp_isr(int irq, void *data) atomic_inc(&tp->assert_cnt); - wake_up(&tp->xfer_wait); - return IRQ_WAKE_THREAD; } @@ -425,6 +423,8 @@ static irqreturn_t vsc_tp_thread_isr(int irq, void *data) { struct vsc_tp *tp = data; + wake_up(&tp->xfer_wait); + if (tp->event_notify) tp->event_notify(tp->event_notify_context); -- 2.39.2