From patchwork Tue Oct 17 18:21:47 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Limonciello, Mario" X-Patchwork-Id: 10012739 X-Patchwork-Delegate: dvhart@infradead.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 042AC60211 for ; Tue, 17 Oct 2017 18:27:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EF108289EC for ; Tue, 17 Oct 2017 18:27:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E3F07289F3; Tue, 17 Oct 2017 18:27:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A3173289EC for ; Tue, 17 Oct 2017 18:27:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760010AbdJQS03 (ORCPT ); Tue, 17 Oct 2017 14:26:29 -0400 Received: from esa7.dell-outbound.iphmx.com ([68.232.153.96]:22130 "EHLO esa7.dell-outbound.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S937368AbdJQSWH (ORCPT ); Tue, 17 Oct 2017 14:22:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=dell.com; i=@dell.com; q=dns/txt; s=smtpout; t=1508264097; x=1539800097; h=from:to:cc:subject:date:message-id; bh=kVGqtyRrWEIXUaTp/LlD7YcD6XaOzokyfr4RLw2C2Xc=; b=1GrLjTI0uED+ATpBvKFjchscvxp/Q88VALa5O1rjSdWhOu02sfYLfVOE kBSqXoP87ELt3A2F34obtNhBnZYA1AX97qGQwV1yE5HK8FocrTEUChEST 1gE7gbT1Jxdbw4Fd9KpwGii8VnghZ1uTYJeE2Qn9UKra41gmBbQEjto0Y Y=; Received: from esa5.dell-outbound2.iphmx.com ([68.232.153.203]) by esa7.dell-outbound.iphmx.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Oct 2017 13:14:56 -0500 Received: from ausxipps306.us.dell.com ([143.166.148.156]) by esa5.dell-outbound2.iphmx.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 18 Oct 2017 00:14:34 +0600 X-LoopCount0: from 10.208.86.39 X-IronPort-AV: E=Sophos;i="5.43,391,1503378000"; d="scan'208";a="161471156" X-DLP: DLP_GlobalPCIDSS From: Mario Limonciello To: dvhart@infradead.org, Andy Shevchenko Cc: LKML , platform-driver-x86@vger.kernel.org, Andy Lutomirski , quasisec@google.com, pali.rohar@gmail.com, rjw@rjwysocki.net, mjg59@google.com, hch@lst.de, Greg KH , Alan Cox , Mario Limonciello Subject: [PATCH v9 03/17] platform/x86: dell-wmi: clean up wmi descriptor check Date: Tue, 17 Oct 2017 13:21:47 -0500 Message-Id: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Sender: platform-driver-x86-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some cases the wrong type was used for errors and checks can be done more cleanly. Signed-off-by: Mario Limonciello Reviewed-by: Edward O'Callaghan Suggested-by: Andy Shevchenko --- drivers/platform/x86/dell-wmi.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c index 2cfaaa8faf0a..ece2fe341f01 100644 --- a/drivers/platform/x86/dell-wmi.c +++ b/drivers/platform/x86/dell-wmi.c @@ -663,19 +663,19 @@ static int dell_wmi_check_descriptor_buffer(struct wmi_device *wdev) buffer = (u32 *)obj->buffer.pointer; - if (buffer[0] != 0x4C4C4544 && buffer[1] != 0x494D5720) { - dev_err(&wdev->dev, "Dell descriptor buffer has invalid signature (%*ph)\n", - 8, buffer); + if (strncmp(obj->string.pointer, "DELL WMI", 8) != 0) { + dev_err(&wdev->dev, "Dell descriptor buffer has invalid signature (%8ph)\n", + buffer); ret = -EINVAL; goto out; } if (buffer[2] != 0 && buffer[2] != 1) - dev_warn(&wdev->dev, "Dell descriptor buffer has unknown version (%d)\n", + dev_warn(&wdev->dev, "Dell descriptor buffer has unknown version (%u)\n", buffer[2]); if (buffer[3] != 4096) - dev_warn(&wdev->dev, "Dell descriptor buffer has invalid buffer length (%d)\n", + dev_warn(&wdev->dev, "Dell descriptor buffer has invalid buffer length (%u)\n", buffer[3]); priv->interface_version = buffer[2];