From patchwork Tue Mar 8 13:03:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "H. Nikolaus Schaller" X-Patchwork-Id: 550065 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8657AC433EF for ; Tue, 8 Mar 2022 13:03:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347000AbiCHNEv (ORCPT ); Tue, 8 Mar 2022 08:04:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346893AbiCHNEu (ORCPT ); Tue, 8 Mar 2022 08:04:50 -0500 Received: from mo4-p02-ob.smtp.rzone.de (mo4-p02-ob.smtp.rzone.de [85.215.255.80]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5C503A72F; Tue, 8 Mar 2022 05:03:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1646744618; s=strato-dkim-0002; d=goldelico.com; h=Message-Id:Date:Subject:Cc:To:From:Cc:Date:From:Subject:Sender; bh=l1dgMSGICGJL3G77F/MPWlIsjBwTBpqOBLaKyLXW79w=; b=DmqrWWPHGZ8QJ4BswwQFN7jzgi05Pb8UnZ/RgxewGrLoUgORkbaOzhaOAuX0r/t0S6 TZvDK8VF4xDrgBN35MWNaCs2pHbQ9eARMTI//y7m5UjxKgc48zXUtyVA5n3uFgHV4EFH vRP4fJdxRN/4+yCXpqXxwfxFCDOOCefu1pzJPWyymCy2uisk7vaB36hfbyOKrcrDyXf+ nTgTzmg8Vf12SEVI/JwsiXncQfD5ZKDtiP4qpKX1NrryTaS/ZwKUMiM0zhkaYnkoP1Bk fITk2JtEpe8S0fW+v6W1KTCi5Tcoj8uY/fMkLb9R3PBAhkPktpdGEyDcpzxokx29KcZZ X/PQ== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":JGIXVUS7cutRB/49FwqZ7WcJeFKiMhflhwDubTJ9o1OAA2UMf2MwPVbpc9Y=" X-RZG-CLASS-ID: mo00 Received: from iMac.fritz.box by smtp.strato.de (RZmta 47.40.1 DYNA|AUTH) with ESMTPSA id n729cey28D3cSKb (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Tue, 8 Mar 2022 14:03:38 +0100 (CET) From: "H. Nikolaus Schaller" To: Felipe Balbi , Greg Kroah-Hartman , tony@atomide.com Cc: linux-omap@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, letux-kernel@openphoenux.org, kernel@pyra-handheld.com, "H. Nikolaus Schaller" Subject: [PATCH] usb: dwc3: omap: fix "unbalanced disables for smps10_out1" on omap5evm Date: Tue, 8 Mar 2022 14:03:37 +0100 Message-Id: X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Usually, the vbus_regulator (smps10 on omap5evm) boots up disabled. Hence calling regulator_disable() indirectly through dwc3_omap_set_mailbox() during probe leads to: [ 10.332764] WARNING: CPU: 0 PID: 1628 at drivers/regulator/core.c:2853 _regulator_disable+0x40/0x164 [ 10.351919] unbalanced disables for smps10_out1 [ 10.361298] Modules linked in: dwc3_omap(+) clk_twl6040 at24 gpio_twl6040 palmas_gpadc palmas_pwrbutton industrialio snd_soc_omap_mcbsp(+) snd_soc_ti_sdma display_connector ti_tpd12s015 drm leds_gpio drm_panel_orientation_quirks ip_tables x_tables ipv6 autofs4 [ 10.387818] CPU: 0 PID: 1628 Comm: systemd-udevd Not tainted 5.17.0-rc1-letux-lpae+ #8139 [ 10.405129] Hardware name: Generic OMAP5 (Flattened Device Tree) [ 10.411455] unwind_backtrace from show_stack+0x10/0x14 [ 10.416970] show_stack from dump_stack_lvl+0x40/0x4c [ 10.422313] dump_stack_lvl from __warn+0xb8/0x170 [ 10.427377] __warn from warn_slowpath_fmt+0x70/0x9c [ 10.432595] warn_slowpath_fmt from _regulator_disable+0x40/0x164 [ 10.439037] _regulator_disable from regulator_disable+0x30/0x64 [ 10.445382] regulator_disable from dwc3_omap_set_mailbox+0x8c/0xf0 [dwc3_omap] [ 10.453116] dwc3_omap_set_mailbox [dwc3_omap] from dwc3_omap_probe+0x2b8/0x394 [dwc3_omap] [ 10.467021] dwc3_omap_probe [dwc3_omap] from platform_probe+0x58/0xa8 [ 10.481762] platform_probe from really_probe+0x168/0x2fc [ 10.481782] really_probe from __driver_probe_device+0xc4/0xd8 [ 10.481782] __driver_probe_device from driver_probe_device+0x24/0xa4 [ 10.503762] driver_probe_device from __driver_attach+0xc4/0xd8 [ 10.510018] __driver_attach from bus_for_each_dev+0x64/0xa0 [ 10.516001] bus_for_each_dev from bus_add_driver+0x148/0x1a4 [ 10.524880] bus_add_driver from driver_register+0xb4/0xf8 [ 10.530678] driver_register from do_one_initcall+0x90/0x1c4 [ 10.536661] do_one_initcall from do_init_module+0x4c/0x200 [ 10.536683] do_init_module from load_module+0x13dc/0x1910 [ 10.551159] load_module from sys_finit_module+0xc8/0xd8 [ 10.561319] sys_finit_module from __sys_trace_return+0x0/0x18 [ 10.561336] Exception stack(0xc344bfa8 to 0xc344bff0) [ 10.561341] bfa0: b6fb5778 b6fab8d8 00000007 b6ecfbb8 00000000 b6ed0398 [ 10.561341] bfc0: b6fb5778 b6fab8d8 855c0500 0000017b 00020000 b6f9a3cc 00000000 b6fb5778 [ 10.595500] bfe0: bede18f8 bede18e8 b6ec9aeb b6dda1c2 [ 10.601345] ---[ end trace 0000000000000000 ]--- Fix this unnecessary warning by checking if the regulator is enabled. Signed-off-by: H. Nikolaus Schaller --- drivers/usb/dwc3/dwc3-omap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c index e196673f5c64..efaf0db595f4 100644 --- a/drivers/usb/dwc3/dwc3-omap.c +++ b/drivers/usb/dwc3/dwc3-omap.c @@ -242,7 +242,7 @@ static void dwc3_omap_set_mailbox(struct dwc3_omap *omap, break; case OMAP_DWC3_ID_FLOAT: - if (omap->vbus_reg) + if (omap->vbus_reg && regulator_is_enabled(omap->vbus_reg)) regulator_disable(omap->vbus_reg); val = dwc3_omap_read_utmi_ctrl(omap); val |= USBOTGSS_UTMI_OTG_CTRL_IDDIG;