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 399B714884C; Mon, 6 Jan 2025 15:29:54 +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=1736177394; cv=none; b=SSYSHRaiBVBrv4my7YqdrINjjGCT6UaTaMnEgg+aNSynDkPvfJZizVdE7NeWppX9DPmc0gg5fpd+er3OhzXu8073PH24Dpp/KGEUAw+xO3bnBB7j+Hgx44yJ+OwCnlYJUWqWAoazNCxPNKSWYUlvL40EJXMCihc7mpkbSTYITQs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736177394; c=relaxed/simple; bh=1vFW0mltXMfEtscWt+orFz2ObB0rfQ8csNJBETHarc0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=axHjOv4rd7nJm16fHZOV5Mf4jNZ7r7KMhUVrLNN6+lMrn/uYvm/81epc4OvdIvyZlhUxJsh34gCMU3Q1JHt8dne9HPbrETGE5+PxnM/t6FSpeaGThPOuEdDEUiH96/+rybOrdkLBjbbtVmqsbqg1fsaGmYCICmv2sFasuNx2yhE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=j0ep6epp; 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="j0ep6epp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6061C4CED2; Mon, 6 Jan 2025 15:29:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1736177394; bh=1vFW0mltXMfEtscWt+orFz2ObB0rfQ8csNJBETHarc0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j0ep6eppSg2TScHgu1necJdWSPF7aYBu8j70Jz0DpHtORiXJZqaJVAqkO1HYFRaBv 9sS+Nk3DH38Xk5QzcvaD+kfvjGTDV8IH4hxZQe0Bn1zZcmTNONYfOl3V1lcZijs6ba cniSl6B4qP9uz/CUSVCoZ6XXL9McbOsw6gGqi7tY= 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 6.6 149/222] RDMA/hns: Fix missing flush CQE for DWQE Date: Mon, 6 Jan 2025 16:15:53 +0100 Message-ID: <20250106151156.405662780@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250106151150.585603565@linuxfoundation.org> References: <20250106151150.585603565@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chengchang Tang [ Upstream commit e3debdd48423d3d75b9d366399228d7225d902cd ] Flush CQE handler has not been called if QP state gets into errored mode in DWQE path. So, the new added outstanding WQEs will never be flushed. It leads to a hung task timeout when using NFS over RDMA: __switch_to+0x7c/0xd0 __schedule+0x350/0x750 schedule+0x50/0xf0 schedule_timeout+0x2c8/0x340 wait_for_common+0xf4/0x2b0 wait_for_completion+0x20/0x40 __ib_drain_sq+0x140/0x1d0 [ib_core] ib_drain_sq+0x98/0xb0 [ib_core] rpcrdma_xprt_disconnect+0x68/0x270 [rpcrdma] xprt_rdma_close+0x20/0x60 [rpcrdma] xprt_autoclose+0x64/0x1cc [sunrpc] process_one_work+0x1d8/0x4e0 worker_thread+0x154/0x420 kthread+0x108/0x150 ret_from_fork+0x10/0x18 Fixes: 01584a5edcc4 ("RDMA/hns: Add support of direct wqe") Signed-off-by: Chengchang Tang Signed-off-by: Junxian Huang Link: https://patch.msgid.link/20241220055249.146943-5-huangjunxian6@hisilicon.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index c9c9be122471..aded0a7f4283 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -673,6 +673,10 @@ static void write_dwqe(struct hns_roce_dev *hr_dev, struct hns_roce_qp *qp, #define HNS_ROCE_SL_SHIFT 2 struct hns_roce_v2_rc_send_wqe *rc_sq_wqe = wqe; + if (unlikely(qp->state == IB_QPS_ERR)) { + flush_cqe(hr_dev, qp); + return; + } /* All kinds of DirectWQE have the same header field layout */ hr_reg_enable(rc_sq_wqe, RC_SEND_WQE_FLAG); hr_reg_write(rc_sq_wqe, RC_SEND_WQE_DB_SL_L, qp->sl); -- 2.39.5