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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 EC6EAC43219 for ; Sat, 27 Apr 2019 01:49:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B77CC206BA for ; Sat, 27 Apr 2019 01:49:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556329758; bh=u/7X6bPTk7eTj2MDE1+JTRr1atlYAerRaffnxKFQpUA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rfvElQ+15ItOCr7rQjQYbv4ep8IJlfHWOntj8B440ikhU8aacyCjz0g/C1waB8y2/ BuYFP6LXl0j8/2f7Yg/XxHDSOJfBXbmQBRdeIZVEu3uVZ/Mey2qoTd1wLY9G4C0xbY LCIsqMUZZ5mWtniqJ+QhoS7i0iYBfQXhOC76dBdw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727948AbfD0BtR (ORCPT ); Fri, 26 Apr 2019 21:49:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:46078 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728456AbfD0BmB (ORCPT ); Fri, 26 Apr 2019 21:42:01 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 34114208CB; Sat, 27 Apr 2019 01:42:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556329320; bh=u/7X6bPTk7eTj2MDE1+JTRr1atlYAerRaffnxKFQpUA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mr5rmSNw3N5XCfA/r3yxZRDs6iwSP1+/Z/gIxvfA1+ZjOl03MpaPNdpV156xqkwZv gy5DBA5tzbRd+ngmpp5/fPdrz9VTxadGIvP95nDr3PSzwiOdk89fbmcrhHMUTDNaoA 7ynrwIgQd+cFIXISO4smz00fTiioilKYrciP6v4w= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Brian Norris , Linus Torvalds , Sasha Levin , linux-bluetooth@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 42/53] Bluetooth: btusb: request wake pin with NOAUTOEN Date: Fri, 26 Apr 2019 21:40:39 -0400 Message-Id: <20190427014051.7522-42-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190427014051.7522-1-sashal@kernel.org> References: <20190427014051.7522-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Brian Norris [ Upstream commit 771acc7e4a6e5dba779cb1a7fd851a164bc81033 ] Badly-designed systems might have (for example) active-high wake pins that default to high (e.g., because of external pull ups) until they have an active firmware which starts driving it low. This can cause an interrupt storm in the time between request_irq() and disable_irq(). We don't support shared interrupts here, so let's just pre-configure the interrupt to avoid auto-enabling it. Fixes: fd913ef7ce61 ("Bluetooth: btusb: Add out-of-band wakeup support") Fixes: 5364a0b4f4be ("arm64: dts: rockchip: move QCA6174A wakeup pin into its USB node") Signed-off-by: Brian Norris Reviewed-by: Matthias Kaehlcke Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- drivers/bluetooth/btusb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 77b67a5f21ee..40a4f95f6178 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2888,6 +2888,7 @@ static int btusb_config_oob_wake(struct hci_dev *hdev) return 0; } + irq_set_status_flags(irq, IRQ_NOAUTOEN); ret = devm_request_irq(&hdev->dev, irq, btusb_oob_wake_handler, 0, "OOB Wake-on-BT", data); if (ret) { @@ -2902,7 +2903,6 @@ static int btusb_config_oob_wake(struct hci_dev *hdev) } data->oob_wake_irq = irq; - disable_irq(irq); bt_dev_info(hdev, "OOB Wake-on-BT configured at IRQ %u", irq); return 0; } -- 2.19.1