From nobody Sat Sep 21 05:39:59 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 170558241390084.96552140472534; Thu, 18 Jan 2024 04:53:33 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rQRrX-0003m6-6y; Thu, 18 Jan 2024 07:51:15 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rQRrS-0003kI-ET; Thu, 18 Jan 2024 07:51:11 -0500 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rQRrP-0000U9-OA; Thu, 18 Jan 2024 07:51:09 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 34093452C9; Thu, 18 Jan 2024 15:51:27 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id EA4CA668BD; Thu, 18 Jan 2024 15:50:56 +0300 (MSK) Received: (nullmailer pid 2502737 invoked by uid 1000); Thu, 18 Jan 2024 12:50:56 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Pavel Pisa , Grant Ramsay , Michael Tokarev Subject: [Stable-8.1.5 04/11] hw/net/can/sja1000: fix bug for single acceptance filter and standard frame Date: Thu, 18 Jan 2024 15:50:42 +0300 Message-Id: <20240118125056.2502687-4-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1705582415486100001 Content-Type: text/plain; charset="utf-8" From: Pavel Pisa A CAN sja1000 standard frame filter mask has been computed and applied incorrectly for standard frames when single Acceptance Filter Mode (MOD_AFM =3D 1) has been selected. The problem has not been found by Linux kernel testing because it uses dual filter mode (MOD_AFM =3D 0) and leaves falters fully open. The problem has been noticed by Grant Ramsay when testing with Zephyr RTOS which uses single filter mode. Signed-off-by: Pavel Pisa Reported-by: Grant Ramsay Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2028 Fixes: 733210e754 ("hw/net/can: SJA1000 chip register level emulation") Message-ID: <20240103231426.5685-1-pisa@fel.cvut.cz> (cherry picked from commit 25145a7d7735344a469551946fc2a7f19eb4aa3d) Signed-off-by: Michael Tokarev diff --git a/hw/net/can/can_sja1000.c b/hw/net/can/can_sja1000.c index 73201f9139..575df7d2f8 100644 --- a/hw/net/can/can_sja1000.c +++ b/hw/net/can/can_sja1000.c @@ -108,7 +108,7 @@ void can_sja_single_filter(struct qemu_can_filter *filt= er, } =20 filter->can_mask =3D (uint32_t)amr[0] << 3; - filter->can_mask |=3D (uint32_t)amr[1] << 5; + filter->can_mask |=3D (uint32_t)amr[1] >> 5; filter->can_mask =3D ~filter->can_mask & QEMU_CAN_SFF_MASK; if (!(amr[1] & 0x10)) { filter->can_mask |=3D QEMU_CAN_RTR_FLAG; --=20 2.39.2