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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 58FC0C2BA19 for ; Wed, 15 Apr 2020 12:02:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2BB4020575 for ; Wed, 15 Apr 2020 12:02:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586952173; bh=3h2z9IDbzxVQV+fUdUOCvqUsPvo+eOXmgmiUdyvpTDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=isrXoDJn8BGBEU/Jexoen6PjGVbh/DMeR2w/orpvRWrmyOhDwq8RdUb/Z0ome+K/M Ctfqrky/Sa8V1rLEXh0uGWq50pJQ6Gx4t57wXmQgY2Lgz64068ZzEbzIgKXWg8aPRR BUD97ID2LJF45c5ZQaH8zezY2dtTfkClXKDJLIfw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S368225AbgDOMCv (ORCPT ); Wed, 15 Apr 2020 08:02:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:44224 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2409468AbgDOLs3 (ORCPT ); Wed, 15 Apr 2020 07:48:29 -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 571AB20768; Wed, 15 Apr 2020 11:48:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586951309; bh=3h2z9IDbzxVQV+fUdUOCvqUsPvo+eOXmgmiUdyvpTDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wcem1IrYd7WCHOBy8GeUuBtfaR6dQgUMOt0FTExAdfdAtTs6uEk9ll2wr8nFKG1ck H4GQWz6fEVTMdKG019LcpLhMaOtNx+0Jx9JGxp0m9qMaaapHFGB3nErjBDWCz/dCsc NnmcPhj2sQDqC8rcpTfSMQTL/oRl0KCUxAr0/TZg= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Andy Shevchenko , Oliver Neukum , Greg Kroah-Hartman , Lee Jones , Sasha Levin Subject: [PATCH AUTOSEL 4.4 12/14] mfd: dln2: Fix sanity checking for endpoints Date: Wed, 15 Apr 2020 07:48:12 -0400 Message-Id: <20200415114814.15954-12-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200415114814.15954-1-sashal@kernel.org> References: <20200415114814.15954-1-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: Andy Shevchenko [ Upstream commit fb945c95a482200876993977008b67ea658bd938 ] While the commit 2b8bd606b1e6 ("mfd: dln2: More sanity checking for endpoints") tries to harden the sanity checks it made at the same time a regression, i.e. mixed in and out endpoints. Obviously it should have been not tested on real hardware at that time, but unluckily it didn't happen. So, fix above mentioned typo and make device being enumerated again. While here, introduce an enumerator for magic values to prevent similar issue to happen in the future. Fixes: 2b8bd606b1e6 ("mfd: dln2: More sanity checking for endpoints") Cc: Oliver Neukum Cc: Greg Kroah-Hartman Signed-off-by: Andy Shevchenko Signed-off-by: Lee Jones Signed-off-by: Sasha Levin --- drivers/mfd/dln2.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/dln2.c b/drivers/mfd/dln2.c index 95d0f2df0ad42..672831d5ee32e 100644 --- a/drivers/mfd/dln2.c +++ b/drivers/mfd/dln2.c @@ -93,6 +93,11 @@ struct dln2_mod_rx_slots { spinlock_t lock; }; +enum dln2_endpoint { + DLN2_EP_OUT = 0, + DLN2_EP_IN = 1, +}; + struct dln2_dev { struct usb_device *usb_dev; struct usb_interface *interface; @@ -740,10 +745,10 @@ static int dln2_probe(struct usb_interface *interface, hostif->desc.bNumEndpoints < 2) return -ENODEV; - epin = &hostif->endpoint[0].desc; - epout = &hostif->endpoint[1].desc; + epout = &hostif->endpoint[DLN2_EP_OUT].desc; if (!usb_endpoint_is_bulk_out(epout)) return -ENODEV; + epin = &hostif->endpoint[DLN2_EP_IN].desc; if (!usb_endpoint_is_bulk_in(epin)) return -ENODEV; -- 2.20.1