From patchwork Fri Mar 1 23:12:08 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Frank Schaefer X-Patchwork-Id: 17018 Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.72) (envelope-from ) id 1UBZ7D-0006jS-1M; Sat, 02 Mar 2013 00:11:47 +0100 X-tubIT-Incoming-IP: 209.132.180.67 Received: from vger.kernel.org ([209.132.180.67]) by mail.tu-berlin.de (exim-4.75/mailfrontend-3) with esmtp id 1UBZ7C-0006Xd-E8; Sat, 02 Mar 2013 00:11:46 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751998Ab3CAXLo (ORCPT + 1 other); Fri, 1 Mar 2013 18:11:44 -0500 Received: from mail-ee0-f50.google.com ([74.125.83.50]:65006 "EHLO mail-ee0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751475Ab3CAXLm (ORCPT ); Fri, 1 Mar 2013 18:11:42 -0500 Received: by mail-ee0-f50.google.com with SMTP id e51so2830137eek.9 for ; Fri, 01 Mar 2013 15:11:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20120113; h=x-received:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references:mime-version:content-type:content-transfer-encoding; bh=SUzTsotI1a2Af0FvigR0jbHgaB/c1pjFMmL6RBT/sKk=; b=anMUpIey8L+dyXWeFPWnVxuujxMaSvAr5a73BgwqiskWd53un/Ghn9hNsR6N0uUUtA x/ZKESh28CZMTc8bSUnAij/Jj0xOdeE3n9NH4F/+NpglYw/iubSd1wu2kNwej6PJqoxv 0k6MImoW1MGDamZviX8K39eyPDC+M2ISfBv8XYmsw9L0N74USy0g/Pl9iyEfZv0Or6Be olFfqHZ7gXxglB/2GA/6m3esHn/pMNQBepWHRrGKynQvOU+vOTCghUFaFyKl2DVhiKBJ I33tQ1yXFanVvMEIEOF7bI6UpDHWsuqa9ulBH+cqXsOoMstC/yJwUx4EKEsQa57ViTQL iHIg== X-Received: by 10.15.23.193 with SMTP id h41mr32549291eeu.17.1362179501099; Fri, 01 Mar 2013 15:11:41 -0800 (PST) Received: from Athlon64X2-5000.site (ip-178-201-83-213.unitymediagroup.de. [178.201.83.213]) by mx.google.com with ESMTPS id d47sm19488041eem.9.2013.03.01.15.11.37 (version=TLSv1.2 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 01 Mar 2013 15:11:39 -0800 (PST) From: =?UTF-8?q?Frank=20Sch=C3=A4fer?= To: mchehab@redhat.com Cc: linux-media@vger.kernel.org, =?UTF-8?q?Frank=20Sch=C3=A4fer?= Subject: [PATCH 04/11] em28xx: do not interpret eeprom content if eeprom key is invalid Date: Sat, 2 Mar 2013 00:12:08 +0100 Message-Id: <1362179535-18929-5-git-send-email-fschaefer.oss@googlemail.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1362179535-18929-1-git-send-email-fschaefer.oss@googlemail.com> References: <1362179535-18929-1-git-send-email-fschaefer.oss@googlemail.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-PMX-Version: 5.6.1.2065439, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2013.3.1.230018 X-PMX-Spam: Gauge=IIIIIIII, Probability=8%, Report=' MULTIPLE_RCPTS 0.1, HTML_00_01 0.05, HTML_00_10 0.05, BODYTEXTP_SIZE_3000_LESS 0, BODY_SIZE_1200_1299 0, BODY_SIZE_2000_LESS 0, BODY_SIZE_5000_LESS 0, BODY_SIZE_7000_LESS 0, CT_TEXT_PLAIN_UTF8_CAPS 0, DKIM_SIGNATURE 0, URI_ENDS_IN_HTML 0, __ANY_URI 0, __CP_URI_IN_BODY 0, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __FRAUD_BODY_WEBMAIL 0, __FRAUD_WEBMAIL 0, __FRAUD_WEBMAIL_FROM 0, __HAS_FROM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __IN_REP_TO 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __MULTIPLE_RCPTS_CC_X2 0, __PHISH_SPEAR_STRUCTURE_1 0, __SANE_MSGID 0, __STOCK_PHRASE_7 0, __SUBJ_ALPHA_END 0, __TO_MALFORMED_2 0, __TO_NO_NAME 0, __URI_NO_WWW 0, __URI_NS , __YOUTUBE_RCVD 0' If the eeprom key isn't valid, either a different (currently unknown) format is used or the eeprom is corrupted. In both cases it doesn't make sense to interpret the data. Also print an error message. Signed-off-by: Frank Schäfer --- drivers/media/usb/em28xx/em28xx-i2c.c | 8 ++++++-- 1 Datei geändert, 6 Zeilen hinzugefügt(+), 2 Zeilen entfernt(-) diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c b/drivers/media/usb/em28xx/em28xx-i2c.c index d765567..9612086 100644 --- a/drivers/media/usb/em28xx/em28xx-i2c.c +++ b/drivers/media/usb/em28xx/em28xx-i2c.c @@ -434,8 +434,12 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) printk("\n"); } - if (em_eeprom->id == 0x9567eb1a) - dev->hash = em28xx_hash_mem(eedata, len, 32); + if (em_eeprom->id != 0x9567eb1a) { + em28xx_errdev("Unknown eeprom type or eeprom corrupted !"); + return -ENODEV; + } + + dev->hash = em28xx_hash_mem(eedata, len, 32); em28xx_info("EEPROM ID = 0x%08x, EEPROM hash = 0x%08lx\n", em_eeprom->id, dev->hash);