From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A0F7C433FF for ; Mon, 29 Jul 2019 20:02:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6D3992064C for ; Mon, 29 Jul 2019 20:02:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564430532; bh=KPPBZK6p8Y6ZUCrK3RWkKednYxSPHn12Xv31/wi0bvI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=k2Ij+83gDRsClrPusFIJgUh7y3LbAyJZs1EkwgCHk65P7PIOrNTdXFl5wSAL9F9oU v3oU66fYzL0IMKxlhwIEnzIHSjbYEAoQhI79KG3j5wo4cF08nXvDxzsvQznkGpEEvI Xa8pcxWQDJ9ZJ5/9FB5/OA8QeSFSa31DzOv0wKtQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390168AbfG2TtS (ORCPT ); Mon, 29 Jul 2019 15:49:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:39758 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389931AbfG2TtR (ORCPT ); Mon, 29 Jul 2019 15:49:17 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 17A3C21655; Mon, 29 Jul 2019 19:49:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564429756; bh=KPPBZK6p8Y6ZUCrK3RWkKednYxSPHn12Xv31/wi0bvI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fd1K7AZKlCxSj6l9DIKXyLU8PLIWhUn2F4zWWqBD1693z4Wcvc+xoJ7YApofcamxT XHoNzoBXKDBrVJKyVUQGYr5dvrsBSxr8DqrFzjKJFRB8kVEfCcOezz2fZvykXzv4Sc 8fmkG1aLeMSI/ATQIYL7JXmK66GSm7mi4+mvZBbw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Neil Armstrong , Kevin Hilman , Kishon Vijay Abraham I , Sasha Levin Subject: [PATCH 5.2 086/215] phy: meson-g12a-usb3-pcie: disable locking for cr_regmap Date: Mon, 29 Jul 2019 21:21:22 +0200 Message-Id: <20190729190754.386740892@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190729190739.971253303@linuxfoundation.org> References: <20190729190739.971253303@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 5fc2aa3ec9efad97dd7c316f3c8e4c6268bbed9b ] Locking is not needed for the phy_g12a_usb3_pcie_cr_bus_read/write() and currently it causes the following BUG because of the usage of the regmap_read_poll_timeout() running in spinlock_irq, configured by regmap fast_io. Simply disable locking in the cr_regmap config since it's only used from the PHY init callback function. BUG: sleeping function called from invalid context at drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c:85 in_atomic(): 1, irqs_disabled(): 128, pid: 60, name: kworker/3:1 [snip] Workqueue: events deferred_probe_work_func Call trace: dump_backtrace+0x0/0x190 show_stack+0x14/0x20 dump_stack+0x90/0xb4 ___might_sleep+0xec/0x110 __might_sleep+0x50/0x88 phy_g12a_usb3_pcie_cr_bus_addr.isra.0+0x80/0x1a8 phy_g12a_usb3_pcie_cr_bus_read+0x34/0x1d8 _regmap_read+0x60/0xe0 _regmap_update_bits+0xc4/0x110 regmap_update_bits_base+0x60/0x90 phy_g12a_usb3_pcie_init+0xdc/0x210 phy_init+0x74/0xd0 dwc3_meson_g12a_probe+0x2cc/0x4d0 platform_drv_probe+0x50/0xa0 really_probe+0x20c/0x3b8 driver_probe_device+0x68/0x150 __device_attach_driver+0xa8/0x170 bus_for_each_drv+0x64/0xc8 __device_attach+0xd8/0x158 device_initial_probe+0x10/0x18 bus_probe_device+0x90/0x98 deferred_probe_work_func+0x94/0xe8 process_one_work+0x1e0/0x338 worker_thread+0x230/0x458 kthread+0x134/0x138 ret_from_fork+0x10/0x1c Fixes: 36077e16c050 ("phy: amlogic: Add Amlogic G12A USB3 + PCIE Combo PHY Driver") Signed-off-by: Neil Armstrong Tested-by: Kevin Hilman Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Sasha Levin --- drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c b/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c index 6233a7979a93..ac322d643c7a 100644 --- a/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c +++ b/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c @@ -188,7 +188,7 @@ static const struct regmap_config phy_g12a_usb3_pcie_cr_regmap_conf = { .reg_read = phy_g12a_usb3_pcie_cr_bus_read, .reg_write = phy_g12a_usb3_pcie_cr_bus_write, .max_register = 0xffff, - .fast_io = true, + .disable_locking = true, }; static int phy_g12a_usb3_init(struct phy *phy) -- 2.20.1