From patchwork Tue Nov 7 07:16:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qiang Yu X-Patchwork-Id: 13447984 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77D47CA46 for ; Tue, 7 Nov 2023 07:16:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="DqHT70hv" Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E0A511D; Mon, 6 Nov 2023 23:16:42 -0800 (PST) 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 3A770FUk029918; Tue, 7 Nov 2023 07:16:34 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; s=qcppdkim1; bh=MW+pjJx+dmWrkSa5rLsX0OV6610yTNFNB2ply4qeBIA=; b=DqHT70hvY4EexM/RYRfdtWGOnMwi/RJjdsiqN5GNcGBPIq5hrAGYzWqhf2LYLSMAeibV qgF2EjbQc61YYA96XA/RX1GE/x9JH7Sk4rv2q94qArSuPsF13edT1f9EKXxQ9kbXynCm f5yywSW6IMOW6ar7wVGrUsGwWXWDT1QRkWtm6QWiJ9W32qLSS7Qdv7YkVbX81WgzEw0s A8wMzSORAqFJ6gBFXDu/an2U300La4z8cSttpnb44+i4Z+QZShhOf0HyEK9lQT/68Hj0 ZJDautlyaZM7w1Lp5fgz8+8YJM4C7Hc2gq4itaZoOEd2aXHIcGJzZT9TUN9psuYqvbFo JA== Received: from aptaippmta02.qualcomm.com (tpe-colo-wan-fw-bordernet.qualcomm.com [103.229.16.4]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3u72bthx5j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 07 Nov 2023 07:16:34 +0000 Received: from pps.filterd (APTAIPPMTA02.qualcomm.com [127.0.0.1]) by APTAIPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 3A77GBOH008385; Tue, 7 Nov 2023 07:16:11 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APTAIPPMTA02.qualcomm.com (PPS) with ESMTP id 3u5f1kdxk3-1; Tue, 07 Nov 2023 07:16:11 +0000 Received: from APTAIPPMTA02.qualcomm.com (APTAIPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3A77GB67008380; Tue, 7 Nov 2023 07:16:11 GMT Received: from cbsp-sh-gv.qualcomm.com (CBSP-SH-gv.ap.qualcomm.com [10.231.249.68]) by APTAIPPMTA02.qualcomm.com (PPS) with ESMTP id 3A77GAH1008377; Tue, 07 Nov 2023 07:16:10 +0000 Received: by cbsp-sh-gv.qualcomm.com (Postfix, from userid 4098150) id 1B95B5441; Tue, 7 Nov 2023 15:16:10 +0800 (CST) From: Qiang Yu To: mani@kernel.org, quic_jhugo@quicinc.com Cc: mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, quic_cang@quicinc.com, quic_mrana@quicinc.com, Hemant Kumar , Lazarus Motha , Qiang Yu Subject: [PATCH v3 4/4] bus: mhi: host: Take irqsave lock after TRE is generated Date: Tue, 7 Nov 2023 15:16:05 +0800 Message-Id: <1699341365-47737-5-git-send-email-quic_qianyu@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1699341365-47737-1-git-send-email-quic_qianyu@quicinc.com> References: <1699341365-47737-1-git-send-email-quic_qianyu@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: qSWrqvccYDix-QsJoEGPNQYQpt-AeHLT X-Proofpoint-GUID: qSWrqvccYDix-QsJoEGPNQYQpt-AeHLT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-06_15,2023-11-02_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=668 mlxscore=0 bulkscore=0 phishscore=0 impostorscore=0 adultscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 spamscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310240000 definitions=main-2311070059 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: From: Hemant Kumar Take irqsave lock after TRE is generated to avoid deadlock due to core getting interrupts enabled as local_bh_enable must not be called with irqs disabled based on upstream patch. Signed-off-by: Hemant Kumar Signed-off-by: Lazarus Motha Signed-off-by: Qiang Yu --- drivers/bus/mhi/host/main.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index b137d54..93b5110 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -1129,17 +1129,15 @@ static int mhi_queue(struct mhi_device *mhi_dev, struct mhi_buf_info *buf_info, if (unlikely(MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))) return -EIO; - read_lock_irqsave(&mhi_cntrl->pm_lock, flags); - ret = mhi_is_ring_full(mhi_cntrl, tre_ring); - if (unlikely(ret)) { - ret = -EAGAIN; - goto exit_unlock; - } + if (unlikely(ret)) + return -EAGAIN; ret = mhi_gen_tre(mhi_cntrl, mhi_chan, buf_info, mflags); if (unlikely(ret)) - goto exit_unlock; + return ret; + + read_lock_irqsave(&mhi_cntrl->pm_lock, flags); /* Packet is queued, take a usage ref to exit M3 if necessary * for host->device buffer, balanced put is done on buffer completion @@ -1159,7 +1157,6 @@ static int mhi_queue(struct mhi_device *mhi_dev, struct mhi_buf_info *buf_info, if (dir == DMA_FROM_DEVICE) mhi_cntrl->runtime_put(mhi_cntrl); -exit_unlock: read_unlock_irqrestore(&mhi_cntrl->pm_lock, flags); return ret;