From patchwork Mon Apr 10 15:58:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeffrey Hugo X-Patchwork-Id: 13206485 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 851C2C76196 for ; Mon, 10 Apr 2023 15:59:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230185AbjDJP7M (ORCPT ); Mon, 10 Apr 2023 11:59:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38606 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230141AbjDJP7E (ORCPT ); Mon, 10 Apr 2023 11:59:04 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57910B0; Mon, 10 Apr 2023 08:58:47 -0700 (PDT) Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 33AAMUiO024759; Mon, 10 Apr 2023 15:58:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=mmcyLRiBJx9gAHhptPzkuDIDBuac3B3MBef4hnojS2M=; b=WhihGZkGRgs5ztarMq+wh4Wo2nvZV84EB3c0t6m5YsR5xAtmW4FsogpDcVUfY8P5as0x E18UHmKWrs1MeE4v6jeKpo1/jKRX27Q8PjfvIae5K7L+Q3VOdL5VG+0H1UjpC4a+bY5V Zv3swp/FK827evhJtdgnxDHGU2GUxV2GKWuhUm2/jSGhEr56vnACACa+kp2MG3OvbaRN KjMnarNQAODo6EM+hEOywUUgZO0BvQ1Ln3aOfK6dg2IP1+A9IEGuFXbYQoUCytnHsCqP l4N39n4KMggSGrS02banNVBy1BJ/vUbeCqGWQTVKKkDYoi1N4j+DNbHoB+hNgEzbe6xa lA== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3pu0c33bf6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 10 Apr 2023 15:58:37 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 33AFwaHm015262 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 10 Apr 2023 15:58:36 GMT Received: from jhugo-lnx.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Mon, 10 Apr 2023 08:58:36 -0700 From: Jeffrey Hugo To: CC: , , , Jeffrey Hugo , Subject: [PATCH v2 1/2] bus: mhi: host: Remove duplicate ee check for syserr Date: Mon, 10 Apr 2023 09:58:11 -0600 Message-ID: <1681142292-27571-2-git-send-email-quic_jhugo@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1681142292-27571-1-git-send-email-quic_jhugo@quicinc.com> References: <1681142292-27571-1-git-send-email-quic_jhugo@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 6ESPAp2ed3QSNIlH3WOqeug9W06acyNm X-Proofpoint-ORIG-GUID: 6ESPAp2ed3QSNIlH3WOqeug9W06acyNm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-10_11,2023-04-06_03,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 phishscore=0 mlxscore=0 suspectscore=0 clxscore=1015 spamscore=0 malwarescore=0 adultscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304100135 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org If we detect a system error via intvec, we only process the syserr if the current ee is different than the last observed ee. The reason for this check is to prevent bhie from running multiple times, but with the single queue handling syserr, that is not possible. The check can cause an issue with device recovery. If PBL loads a bad SBL via BHI, but that SBL hangs before notifying the host of an ee change, then issuing soc_reset to crash the device and retry (after supplying a fixed SBL) will not recover the device as the host will observe a PBL->PBL transition and not process the syserr. The device will be stuck until either the driver is reloaded, or the host is rebooted. Instead, remove the check so that we can attempt to recover the device. Fixes: ef2126c4e2ea ("bus: mhi: core: Process execution environment changes serially") Cc: stable@vger.kernel.org Signed-off-by: Jeffrey Hugo Reviewed-by: Carl Vanderlip Reviewed-by: Manivannan Sadhasivam --- drivers/bus/mhi/host/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index 4fa0969..3a08518 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -503,7 +503,7 @@ irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv) } write_unlock_irq(&mhi_cntrl->pm_lock); - if (pm_state != MHI_PM_SYS_ERR_DETECT || ee == mhi_cntrl->ee) + if (pm_state != MHI_PM_SYS_ERR_DETECT) goto exit_intvec; switch (ee) {