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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 150A9C43381 for ; Fri, 8 Mar 2019 13:05:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C8B5720661 for ; Fri, 8 Mar 2019 13:05:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552050309; bh=NrBPZkbhAGF3+KNXqR+S/OmLVaXaSwG+L+m/lLiTm+o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NuuJNXL+35cY5Vwt6Vj4foMf/npTHIT7ca1zEU3Ep59PguhgNdUxIo/URsDl3fX7V Sc0ryV3kzFtkFHWKkezgRLJrbKcZ1kIsVFJ6A7Zpc0aIIGSUk59HUco1vKoFaDZH2u v0H4TTL1YLLvzx+kuXOq29QnqmyCNrB5PcELCYnw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727613AbfCHNFI (ORCPT ); Fri, 8 Mar 2019 08:05:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:33198 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727189AbfCHM4y (ORCPT ); Fri, 8 Mar 2019 07:56:54 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 AB9BF20449; Fri, 8 Mar 2019 12:56:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552049814; bh=NrBPZkbhAGF3+KNXqR+S/OmLVaXaSwG+L+m/lLiTm+o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=osuzH4bIpHyrFAU226QN5eCo+O/14cASvUPHEsvj5S2HfqL6WzOOn+hXo74qxlcx3 et9jhEE85JZ0pgY8hYIoARqHIJCZXX5CQ9UgDaAU970JlIxpRUcX1qykRHr3pzwmLj V6AZDv2zDI+MQD8STwfP8CKknF1zixRT9njexGcs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Karoly Pados , Johan Hovold Subject: [PATCH 4.20 70/76] USB: serial: cp210x: fix GPIO in autosuspend Date: Fri, 8 Mar 2019 13:50:22 +0100 Message-Id: <20190308124917.269008005@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190308124914.789210760@linuxfoundation.org> References: <20190308124914.789210760@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Karoly Pados commit 7b0b644b9aa2de5032db0f468fddca091d0b7b90 upstream. Current GPIO code in cp210x fails to take USB autosuspend into account, making it practically impossible to use GPIOs with autosuspend enabled without user configuration. Fix this like for ftdi_sio in a previous patch. Tested on a CP2102N. Signed-off-by: Karoly Pados Fixes: cf5276ce7867 ("USB: serial: cp210x: Adding GPIO support for CP2105") Cc: stable Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/cp210x.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -1354,8 +1354,13 @@ static int cp210x_gpio_get(struct gpio_c if (priv->partnum == CP210X_PARTNUM_CP2105) req_type = REQTYPE_INTERFACE_TO_HOST; + result = usb_autopm_get_interface(serial->interface); + if (result) + return result; + result = cp210x_read_vendor_block(serial, req_type, CP210X_READ_LATCH, &buf, sizeof(buf)); + usb_autopm_put_interface(serial->interface); if (result < 0) return result; @@ -1376,6 +1381,10 @@ static void cp210x_gpio_set(struct gpio_ buf.mask = BIT(gpio); + result = usb_autopm_get_interface(serial->interface); + if (result) + goto out; + if (priv->partnum == CP210X_PARTNUM_CP2105) { result = cp210x_write_vendor_block(serial, REQTYPE_HOST_TO_INTERFACE, @@ -1393,6 +1402,8 @@ static void cp210x_gpio_set(struct gpio_ NULL, 0, USB_CTRL_SET_TIMEOUT); } + usb_autopm_put_interface(serial->interface); +out: if (result < 0) { dev_err(&serial->interface->dev, "failed to set GPIO value: %d\n", result);