From patchwork Thu Dec 17 23:04:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abhishek Pandit-Subedi X-Patchwork-Id: 345904 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 A7205C4361B for ; Thu, 17 Dec 2020 23:05:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F84123A57 for ; Thu, 17 Dec 2020 23:05:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732324AbgLQXE4 (ORCPT ); Thu, 17 Dec 2020 18:04:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730140AbgLQXE4 (ORCPT ); Thu, 17 Dec 2020 18:04:56 -0500 Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 23A60C0617A7 for ; Thu, 17 Dec 2020 15:04:16 -0800 (PST) Received: by mail-pf1-x42d.google.com with SMTP id c79so357359pfc.2 for ; Thu, 17 Dec 2020 15:04:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=xuN3s87sgv5dYv1RWZnvVr37IV4kzzDZbC355KoF86s=; b=gNYVoiuPmDtcwNGgz1b29ap/WFF1trap8wB+8F3/ztzMefmOEU7saVMs3StoaqtlAH 9Q8N3sf1nJNiAhPl30mLWT9rNWcMRL/4jESUIXbVfkLi8FQUqfpdgxGE7cbX+EuWkw4P 1zxaKNqHwd03cw5UeRIIdyo4kxBqKz2+CUimc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=xuN3s87sgv5dYv1RWZnvVr37IV4kzzDZbC355KoF86s=; b=iedkUkk0AT8lbVrTsLurV2YJwSnx3WYlMpOxGYRskbWoYzHC+Q4uQVtfdunljkGXyU zkTpdWzCQAkaHb0jhJC0x+KYBCSCkPPbGgN+2x+9IuvpQ6In9n2YFfe0jpluEBwi/1yb 1rASktYDFiykF1pIM0RILIRgvnP39lL5D3pQ60xh12I0Q/c1igwFcQc84Rvgf7jVlE6I dXv+PpqJk9E8k+mJ3HvINghva2wfOLSMcujukrpVFjGS+AP7rPpi60tFDYO8Gc2xSM4p ErgvUtqtjiau3Z6fyHtMtSpIVl+hUKpD28DaMJiwuDFdZ7H2c9/J724uaFwM+oK5NavR GCww== X-Gm-Message-State: AOAM531tJu4m54hIOvQtjp9w0HtQllBrspNnet1r3OO3cWvZH5/RGZm1 Qe8pKSZNbGzEa3l6n0VJUVvfhw== X-Google-Smtp-Source: ABdhPJyY7LcYcKznwl8cdcSmFXO7wsiD2aQSfSQOfEtl4hhRILKgwPonDiZBJATkFfNdYx2HSVXcDg== X-Received: by 2002:a63:eb4b:: with SMTP id b11mr1435362pgk.351.1608246255566; Thu, 17 Dec 2020 15:04:15 -0800 (PST) Received: from apsdesk.mtv.corp.google.com ([2620:15c:202:1:7220:84ff:fe09:2b94]) by smtp.gmail.com with ESMTPSA id q23sm6001004pgm.89.2020.12.17.15.04.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Dec 2020 15:04:15 -0800 (PST) From: Abhishek Pandit-Subedi To: marcel@holtmann.org, linux-bluetooth@vger.kernel.org Cc: chromeos-bluetooth-upstreaming@chromium.org, Abhishek Pandit-Subedi , "David S. Miller" , Johan Hedberg , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jakub Kicinski , Luiz Augusto von Dentz Subject: [PATCH] Bluetooth: Pause service discovery for suspend Date: Thu, 17 Dec 2020 15:04:08 -0800 Message-Id: <20201217150346.1.If6feff48e17a881af9cb55526db7f53bf0db40f1@changeid> X-Mailer: git-send-email 2.29.2.729.g45daf8777d-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Just like MGMT_OP_START_DISCOVERY, we should reject MGMT_OP_START_SERVICE_DISCOVERY with MGMT_STATUS_BUSY when we are paused for suspend. Signed-off-by: Abhishek Pandit-Subedi --- On ChromeOS, we started getting reports of scanning failing after resuming from suspend. The root cause was that Start Service Discovery was being called while discovery was supposed to be paused for suspend and it was screwing up some internal state. Adding this check immediately fixed it. The fix was tested by doing the following: * Set Discovery Filter ({'transport': 'auto'}) * Start Discovery * Suspend * Resume * Check the Discovering property Without the fix, this test failed when checking the Discovering property above. net/bluetooth/mgmt.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index fa0f7a4a1d2fc8a..608dda5403b7327 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -4798,6 +4798,14 @@ static int start_service_discovery(struct sock *sk, struct hci_dev *hdev, goto failed; } + if (hdev->discovery_paused) { + err = mgmt_cmd_complete(sk, hdev->id, + MGMT_OP_START_SERVICE_DISCOVERY, + MGMT_STATUS_BUSY, &cp->type, + sizeof(cp->type)); + goto failed; + } + uuid_count = __le16_to_cpu(cp->uuid_count); if (uuid_count > max_uuid_count) { bt_dev_err(hdev, "service_discovery: too big uuid_count value %u",