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=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,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 3571EC4708B for ; Mon, 24 May 2021 15:20:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 22D2E61209 for ; Mon, 24 May 2021 15:20:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235460AbhEXPVD (ORCPT ); Mon, 24 May 2021 11:21:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:40912 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234285AbhEXPHL (ORCPT ); Mon, 24 May 2021 11:07:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7504D613CC; Mon, 24 May 2021 14:51:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621867884; bh=3agf5KXNZ6/n5GIQRNy9BWouSZMCtDuiIdMlV8G2GjQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ofpd8HQCI9I3ae6L3HwBi1AJns8lw8Tfhwtn7dMbB/yd0cSfmpuTT3EktCicwrURL QzNuJ8ZgWPYza7udj6hw9G5SLYAweo/DJOCqvjfMP6Q4WLtJKalotDAf246m5lHNmo 2YNOvVRYrpikJzcF+9KAFDTGX+lKOovGvKWkfwgRJrjjHKOU04rwbuw9W57qj8bFIf dyjF7RTRuGfTly7otauo2Z0Pf0X6U1FRfG9JKazp4n5+PIrK9XXjELx/tFNz2XKK4F 00jf/FZUrDQfWmxWfy9KzChSvMyknDIreHHvP2MpvS1+3d9bzXTA8BqavwzTe8ZH8g c/rjmDdMbVlyg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , Peter Rosin , Jens Axboe , Sasha Levin Subject: [PATCH AUTOSEL 4.9 14/19] cdrom: gdrom: initialize global variable at init time Date: Mon, 24 May 2021 10:51:01 -0400 Message-Id: <20210524145106.2499571-14-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210524145106.2499571-1-sashal@kernel.org> References: <20210524145106.2499571-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg Kroah-Hartman [ Upstream commit 9183f01b5e6e32eb3f17b5f3f8d5ad5ac9786c49 ] As Peter points out, if we were to disconnect and then reconnect this driver from a device, the "global" state of the device would contain odd values and could cause problems. Fix this up by just initializing the whole thing to 0 at probe() time. Ideally this would be a per-device variable, but given the age and the total lack of users of it, that would require a lot of s/./->/g changes for really no good reason. Reported-by: Peter Rosin Cc: Jens Axboe Reviewed-by: Peter Rosin Link: https://lore.kernel.org/r/YJP2j6AU82MqEY2M@kroah.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/cdrom/gdrom.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c index 1852d19d0d7b..2a78aeea84a2 100644 --- a/drivers/cdrom/gdrom.c +++ b/drivers/cdrom/gdrom.c @@ -773,6 +773,13 @@ static int probe_gdrom_setupqueue(void) static int probe_gdrom(struct platform_device *devptr) { int err; + + /* + * Ensure our "one" device is initialized properly in case of previous + * usages of it + */ + memset(&gd, 0, sizeof(gd)); + /* Start the device */ if (gdrom_execute_diagnostic() != 1) { pr_warning("ATA Probe for GDROM failed\n"); @@ -865,7 +872,7 @@ static struct platform_driver gdrom_driver = { static int __init init_gdrom(void) { int rc; - gd.toc = NULL; + rc = platform_driver_register(&gdrom_driver); if (rc) return rc; -- 2.30.2