From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 376432C17A0; Wed, 25 Feb 2026 06:56:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772002596; cv=none; b=ePCF5SGzgMS/GbIIcMW/uhzW1ILzEyqJQ5mooYmCq9181arbtVj5gN1exyCL6PM8vkGQ6H45EnneJ3GXbKDT/XysloeWX94BuN6qBbVp5WNPtoKYThNWSnqu40t7R+h6Mpe3l4CY0NcppmOe3lDACDeHFJZnEeSZVE3EsT9OLRI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772002596; c=relaxed/simple; bh=XzXflIM/79lTYgxbktQfUAPSRNU/MhAiah8Mj6AiVkA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YGNFXMn52viCROiW9yOuFf/sVO2hT5N/NCnAobZuotpZh9Jij2+nND00U52HimMMuPEsVVwk/zXBZKZTei7Y2yzvLMxThVoxylpBecdT8xTDILd6MSbmlFmrxuMOnoeAYWk6mbQcx//jaAxrxEi1bH9auwai9KtblsMUvR1u3kE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=j3WfV/+N; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="j3WfV/+N" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0E72BC116D0; Wed, 25 Feb 2026 06:56:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1772002596; bh=XzXflIM/79lTYgxbktQfUAPSRNU/MhAiah8Mj6AiVkA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j3WfV/+N8L5Cr17WsboI+1gU7thrPyMp8SWL0maIhD7ighbX8s6t5CrkZqSVl1/SX bmpH1+/lZ57YOw/tBtstD2ybFXpCejSiYI+IWMRZZi6NXhNjgnBpGfKD7qPowPmzHA NzIqI0I20WfIbmhwdWN10UbWEkxJcLsywg+ejvt0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chengchang Tang , Junxian Huang , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.18 341/641] RDMA/hns: Notify ULP of remaining soft-WCs during reset Date: Tue, 24 Feb 2026 17:21:07 -0800 Message-ID: <20260225012356.929564230@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225012348.915798704@linuxfoundation.org> References: <20260225012348.915798704@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chengchang Tang [ Upstream commit 0789f929900d85b80b343c5f04f8b9444e991384 ] During a reset, software-generated WCs cannot be reported via interrupts. This may cause the ULP to miss some WCs. To avoid this, add check in the CQ arm process: if a hardware reset has occurred and there are still unreported soft-WCs, notify the ULP to handle the remaining WCs, thereby preventing any loss of completions. Fixes: 626903e9355b ("RDMA/hns: Add support for reporting wc as software mode") Signed-off-by: Chengchang Tang Signed-off-by: Junxian Huang Link: https://patch.msgid.link/20260104064057.1582216-5-huangjunxian6@hisilicon.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index b0e7c5c6e2ff5..f895731ad74a0 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -3661,6 +3661,23 @@ static void hns_roce_v2_write_cqc(struct hns_roce_dev *hr_dev, HNS_ROCE_V2_CQ_DEFAULT_INTERVAL); } +static bool left_sw_wc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq) +{ + struct hns_roce_qp *hr_qp; + + list_for_each_entry(hr_qp, &hr_cq->sq_list, sq_node) { + if (hr_qp->sq.head != hr_qp->sq.tail) + return true; + } + + list_for_each_entry(hr_qp, &hr_cq->rq_list, rq_node) { + if (hr_qp->rq.head != hr_qp->rq.tail) + return true; + } + + return false; +} + static int hns_roce_v2_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) { @@ -3669,6 +3686,12 @@ static int hns_roce_v2_req_notify_cq(struct ib_cq *ibcq, struct hns_roce_v2_db cq_db = {}; u32 notify_flag; + if (hr_dev->state >= HNS_ROCE_DEVICE_STATE_RST_DOWN) { + if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && + left_sw_wc(hr_dev, hr_cq)) + return 1; + return 0; + } /* * flags = 0, then notify_flag : next * flags = 1, then notify flag : solocited -- 2.51.0