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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 51993C43381 for ; Fri, 22 Mar 2019 12:07:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11BDE21916 for ; Fri, 22 Mar 2019 12:07:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553256427; bh=DhsYzE728U2E8MODAlrGmmPZQnPjya3A6d1O3ypbu9Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=J0vMK2m1wJ4X3K1S95txDrp/1BvSP7B+U7vTNvGSi28lbZlhh1dLAGB4I0RFEvOUt fksIhTk1D+ixwV1WUlZ+YYEUETSh8QdHkMCflBJ7/szPH48PiISiBWwPTQ3lj64fof HFpq2Ah420/qH4VKV80f+jun2xLPO4dhvImCLTxM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388998AbfCVMHG (ORCPT ); Fri, 22 Mar 2019 08:07:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:45510 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388747AbfCVMHD (ORCPT ); Fri, 22 Mar 2019 08:07:03 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AF14C21916; Fri, 22 Mar 2019 12:07:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553256422; bh=DhsYzE728U2E8MODAlrGmmPZQnPjya3A6d1O3ypbu9Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I05sn37AY2EmrfQAiAe0ZpICnGFNzY17WjDw7lUtnMh6sLh8romzJ6BbCa88mUcxw ZjwgurYHIbM8UVfRmvek2e1fLd7MFhq+Ar1jn39Ru0njRDmXLBcpsOzURD7OtTdVmE TmyVYFhY75tGm71PRqL7jjRUnTLqWjF0QzMz/Wws= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alan Cox , QiaoChong , Sudip Mukherjee Subject: [PATCH 4.19 206/280] parport_pc: fix find_superio io compare code, should use equal test. Date: Fri, 22 Mar 2019 12:15:59 +0100 Message-Id: <20190322111331.762928063@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190322111306.356185024@linuxfoundation.org> References: <20190322111306.356185024@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: QiaoChong commit 21698fd57984cd28207d841dbdaa026d6061bceb upstream. In the original code before 181bf1e815a2 the loop was continuing until it finds the first matching superios[i].io and p->base. But after 181bf1e815a2 the logic changed and the loop now returns the pointer to the first mismatched array element which is then used in get_superio_dma() and get_superio_irq() and thus returning the wrong value. Fix the condition so that it now returns the correct pointer. Fixes: 181bf1e815a2 ("parport_pc: clean up the modified while loops using for") Cc: Alan Cox Cc: stable@vger.kernel.org Signed-off-by: QiaoChong [rewrite the commit message] Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman --- drivers/parport/parport_pc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/parport/parport_pc.c +++ b/drivers/parport/parport_pc.c @@ -1377,7 +1377,7 @@ static struct superio_struct *find_super { int i; for (i = 0; i < NR_SUPERIOS; i++) - if (superios[i].io != p->base) + if (superios[i].io == p->base) return &superios[i]; return NULL; }