From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Eddie Wai" Subject: [PATCH v2 01/14] BNX2I: Fixed bugs in the handling of unsolicited NOP-Ins Date: Thu, 18 Nov 2010 17:29:56 -0800 Message-ID: <1290130209-32133-2-git-send-email-eddie.wai@broadcom.com> References: Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from mms1.broadcom.com ([216.31.210.17]:3045 "EHLO mms1.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751042Ab0KSCFy (ORCPT ); Thu, 18 Nov 2010 21:05:54 -0500 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James Bottomley Cc: Mike Christie , open-iscsi , linux-scsi , Michael Chan , Anil Veerabhadrappa , Ben Li , Eddie Wai Unsolicited NOP-Ins are placed in the receive queue of the hardware which requires to be read out regardless if the receive pipe is suspended or not. This patch adds the disposal of this RQ element under this condition. Also fixed the bug in the unsolicited NOP-In handling routine which checks for the RESERVED_ITT. Signed-off-by: Eddie Wai Reviewed-by: Michael Chan Reviewed-by: Benjamin Li --- drivers/scsi/bnx2i/bnx2i_hwi.c | 23 +++++++++++++++-------- 1 files changed, 15 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/bnx2i/bnx2i_hwi.c b/drivers/scsi/bnx2i/bnx2i_hwi.c index 8d9dbb3..16c76e0 100644 --- a/drivers/scsi/bnx2i/bnx2i_hwi.c +++ b/drivers/scsi/bnx2i/bnx2i_hwi.c @@ -1549,11 +1549,9 @@ static int bnx2i_process_nopin_mesg(struct iscsi_session *session, struct iscsi_task *task; struct bnx2i_nop_in_msg *nop_in; struct iscsi_nopin *hdr; - u32 itt; int tgt_async_nop = 0; nop_in = (struct bnx2i_nop_in_msg *)cqe; - itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX; spin_lock(&session->lock); hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; @@ -1563,7 +1561,7 @@ static int bnx2i_process_nopin_mesg(struct iscsi_session *session, hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); hdr->ttt = cpu_to_be32(nop_in->ttt); - if (itt == (u16) RESERVED_ITT) { + if (nop_in->itt == (u16) RESERVED_ITT) { bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); hdr->itt = RESERVED_ITT; tgt_async_nop = 1; @@ -1571,7 +1569,8 @@ static int bnx2i_process_nopin_mesg(struct iscsi_session *session, } /* this is a response to one of our nop-outs */ - task = iscsi_itt_to_task(conn, itt); + task = iscsi_itt_to_task(conn, + (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); if (task) { hdr->flags = ISCSI_FLAG_CMD_FINAL; hdr->itt = task->hdr->itt; @@ -1721,9 +1720,18 @@ static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) break; - if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) + if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) { + if (nopin->op_code == ISCSI_OP_NOOP_IN && + nopin->itt == (u16) RESERVED_ITT) { + printk(KERN_ALERT "bnx2i: Unsolicited " + "NOP-In detected for suspended " + "connection dev=%s!\n", + bnx2i_conn->hba->netdev->name); + bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); + goto cqe_out; + } break; - + } tgt_async_msg = 0; switch (nopin->op_code) { @@ -1770,10 +1778,9 @@ static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", nopin->op_code); } - if (!tgt_async_msg) bnx2i_conn->ep->num_active_cmds--; - +cqe_out: /* clear out in production version only, till beta keep opcode * field intact, will be helpful in debugging (context dump) * nopin->op_code = 0; -- 1.7.0.5