From patchwork Fri Apr 7 02:46:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 13204429 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 0BEC5C77B6C for ; Fri, 7 Apr 2023 02:46:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239705AbjDGCqY (ORCPT ); Thu, 6 Apr 2023 22:46:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41504 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231867AbjDGCqW (ORCPT ); Thu, 6 Apr 2023 22:46:22 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBF647ED4 for ; Thu, 6 Apr 2023 19:46:21 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-54c01480e3cso55917817b3.1 for ; Thu, 06 Apr 2023 19:46:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1680835581; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=nUz0udxJSncClIXfXpDEBX9ECoOtSVVpf/KdMJ7vysQ=; b=Wt0oTZn2fcVjC7J7ao1RrEACmnskuXW5Y7RH57Bg0T+h9jBUlNoupAWUyDyLfTW/pN WEd44/ggQ2SzaO14FiShx/WghxIFA4ZvwSSwzHeVlSyTQ1gxSXBbh2sLYU4F2izjb8QN D6fUQFjaTQYfUYkHVbNHCdW8Kk2NZT/ZDf8oB12Ro5L8pv0U5Qd/VIUtWhF/EWflY0aG S3fb37isoWdDMd07xuEl++VVRtp8HXfdt3nJJpsdbncr2egeat7GJH/mpqAySzq9iv3b I1PUThLbYl4RNWQqFx3znDP9jE20Cxne92rT6P44z6cwwITtEnKAL3ebacl9O1Atzcie HPDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680835581; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=nUz0udxJSncClIXfXpDEBX9ECoOtSVVpf/KdMJ7vysQ=; b=YbNkcE/JV15H40a2sDgZlkYD8y8q+VCy6A4peBSUZ/n/qbVmspsKA9Av/IOOBmVR39 VugHvbLduWGzsE3EDv1/cUhZfBWFB47FjnfnCgPZdH/SeuWjCu9E6dlrlJwUYtrTKM3Z IZoQBWbsP3jipD9TXEGwbgcjTWuCWeP3t1jQyAgjFhrX/hYN1b0AevIY1iv+yK4i1G3D L/rWtUYWXiJdBcdamGWJfHLMsARULLQrsEZ5SmvifxKSiQNONDBP2Qh5xaU4fSWdKIpa QYZUAaWJHKFXAZsTpPML8CprJsAeVpUK9rjkbqs45s522HZNsYcjRqAw3LxOdzS7bbwG BWsQ== X-Gm-Message-State: AAQBX9fVYJ1bAnkF+DTRh4+JBTXvZ2pocHWP8nfVSC5btZYJMDLIP/rP QLjEWFj8/NlA1jGZSjVeU8eY8fGQKLM= X-Google-Smtp-Source: AKy350Y1ZkusZZ/d+V9apvkNKAvkrhEIZbqxRghfGTgTfVypjt2VIPRyggOZ5HCkwgUmnfW9u0i18xl3aMI= X-Received: from badhri.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:6442]) (user=badhri job=sendgmr) by 2002:a05:690c:72c:b0:52f:184a:da09 with SMTP id bt12-20020a05690c072c00b0052f184ada09mr355489ywb.2.1680835581211; Thu, 06 Apr 2023 19:46:21 -0700 (PDT) Date: Fri, 7 Apr 2023 02:46:16 +0000 In-Reply-To: <20230407024616.2883701-1-badhri@google.com> Mime-Version: 1.0 References: <20230407024616.2883701-1-badhri@google.com> X-Mailer: git-send-email 2.40.0.577.gac1e443424-goog Message-ID: <20230407024616.2883701-2-badhri@google.com> Subject: [PATCH v3 2/2] usb: gadget: udc: core: Prevent redundant calls to pullup From: Badhri Jagan Sridharan To: gregkh@linuxfoundation.org, stern@rowland.harvard.edu, colin.i.king@gmail.com, xuetao09@huawei.com, quic_eserrao@quicinc.com, water.zhangjiantao@huawei.com, peter.chen@freescale.com, balbi@ti.com Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Badhri Jagan Sridharan Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org usb_gadget_connect calls gadget->ops->pullup without checking whether gadget->connected was previously set. Make this symmetric to usb_gadget_disconnect by returning early if gadget->connected is already set. Cc: stable@vger.kernel.org Fixes: 5a1da544e572 ("usb: gadget: core: do not try to disconnect gadget if it is not connected") Signed-off-by: Badhri Jagan Sridharan --- Changes since v2: * none Changes since v1: * Fixed commit message comments. --- drivers/usb/gadget/udc/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index 3eb5d4e392db..7e9ce872451e 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -702,6 +702,9 @@ int usb_gadget_connect_locked(struct usb_gadget *gadget) __must_hold(&gadget->ud goto out; } + if (gadget->connected) + goto out; + if (gadget->deactivated || !gadget->udc->started) { /* * If gadget is deactivated we only save new state.