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From: Manish Rangankar <mrangankar@marvell.com>
To: <martin.petersen@oracle.com>, <lduncan@suse.com>, <cleech@redhat.com>
Cc: <linux-scsi@vger.kernel.org>, <GR-QLogic-Storage-Upstream@marvell.com>
Subject: [PATCH v2 4/8] qedi: Protect active command list to avoid list corruption
Date: Tue, 8 Sep 2020 02:56:53 -0700	[thread overview]
Message-ID: <20200908095657.26821-5-mrangankar@marvell.com> (raw)
In-Reply-To: <20200908095657.26821-1-mrangankar@marvell.com>

From: Nilesh Javali <njavali@marvell.com>

Protect active command list for non i/o commands like,
login response, logout response, text response and recovery
cleanup of active list to avoid list corruption.

Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Manish Rangankar <mrangankar@marvell.com>
---
 drivers/scsi/qedi/qedi_fw.c    | 8 ++++++++
 drivers/scsi/qedi/qedi_iscsi.c | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/drivers/scsi/qedi/qedi_fw.c b/drivers/scsi/qedi/qedi_fw.c
index 34c477bda8a4..f158fde0a43c 100644
--- a/drivers/scsi/qedi/qedi_fw.c
+++ b/drivers/scsi/qedi/qedi_fw.c
@@ -59,6 +59,7 @@ static void qedi_process_logout_resp(struct qedi_ctx *qedi,
 		  "Freeing tid=0x%x for cid=0x%x\n",
 		  cmd->task_id, qedi_conn->iscsi_conn_id);
 
+	spin_lock(&qedi_conn->list_lock);
 	if (likely(cmd->io_cmd_in_list)) {
 		cmd->io_cmd_in_list = false;
 		list_del_init(&cmd->io_cmd);
@@ -69,6 +70,7 @@ static void qedi_process_logout_resp(struct qedi_ctx *qedi,
 			  cmd->task_id, qedi_conn->iscsi_conn_id,
 			  &cmd->io_cmd);
 	}
+	spin_unlock(&qedi_conn->list_lock);
 
 	cmd->state = RESPONSE_RECEIVED;
 	qedi_clear_task_idx(qedi, cmd->task_id);
@@ -122,6 +124,7 @@ static void qedi_process_text_resp(struct qedi_ctx *qedi,
 		  "Freeing tid=0x%x for cid=0x%x\n",
 		  cmd->task_id, qedi_conn->iscsi_conn_id);
 
+	spin_lock(&qedi_conn->list_lock);
 	if (likely(cmd->io_cmd_in_list)) {
 		cmd->io_cmd_in_list = false;
 		list_del_init(&cmd->io_cmd);
@@ -132,6 +135,7 @@ static void qedi_process_text_resp(struct qedi_ctx *qedi,
 			  cmd->task_id, qedi_conn->iscsi_conn_id,
 			  &cmd->io_cmd);
 	}
+	spin_unlock(&qedi_conn->list_lock);
 
 	cmd->state = RESPONSE_RECEIVED;
 	qedi_clear_task_idx(qedi, cmd->task_id);
@@ -222,11 +226,13 @@ static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
 
 	tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
 
+	spin_lock(&qedi_conn->list_lock);
 	if (likely(qedi_cmd->io_cmd_in_list)) {
 		qedi_cmd->io_cmd_in_list = false;
 		list_del_init(&qedi_cmd->io_cmd);
 		qedi_conn->active_cmd_count--;
 	}
+	spin_unlock(&qedi_conn->list_lock);
 
 	if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 	      ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
@@ -288,11 +294,13 @@ static void qedi_process_login_resp(struct qedi_ctx *qedi,
 		  ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 
+	spin_lock(&qedi_conn->list_lock);
 	if (likely(cmd->io_cmd_in_list)) {
 		cmd->io_cmd_in_list = false;
 		list_del_init(&cmd->io_cmd);
 		qedi_conn->active_cmd_count--;
 	}
+	spin_unlock(&qedi_conn->list_lock);
 
 	memset(task_ctx, '\0', sizeof(*task_ctx));
 
diff --git a/drivers/scsi/qedi/qedi_iscsi.c b/drivers/scsi/qedi/qedi_iscsi.c
index f815845fc568..ae86a40ca040 100644
--- a/drivers/scsi/qedi/qedi_iscsi.c
+++ b/drivers/scsi/qedi/qedi_iscsi.c
@@ -975,11 +975,13 @@ static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
 {
 	struct qedi_cmd *cmd, *cmd_tmp;
 
+	spin_lock(&qedi_conn->list_lock);
 	list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
 				 io_cmd) {
 		list_del_init(&cmd->io_cmd);
 		qedi_conn->active_cmd_count--;
 	}
+	spin_unlock(&qedi_conn->list_lock);
 }
 
 static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
-- 
2.25.0


  parent reply	other threads:[~2020-09-08  9:59 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-08  9:56 [PATCH v2 0/8] qedi: Misc bug fixes and enhancements Manish Rangankar
2020-09-08  9:56 ` [PATCH v2 1/8] qedi: Use qed count from set_fp_int in msix allocation Manish Rangankar
2020-09-08  9:56 ` [PATCH v2 2/8] qedi: Skip f/w connection termination for pci shutdown handler Manish Rangankar
2020-09-08  9:56 ` [PATCH v2 3/8] qedi: Fix list_del corruption while removing active IO Manish Rangankar
2020-09-08  9:56 ` Manish Rangankar [this message]
2020-09-08  9:56 ` [PATCH v2 5/8] qedi: Use snprintf instead of sprintf Manish Rangankar
2020-09-08  9:56 ` [PATCH v2 6/8] qedi: Mark all connections for recovery on link down event Manish Rangankar
2020-09-08  9:56 ` [PATCH v2 7/8] qedi: Add firmware error recovery invocation support Manish Rangankar
2020-09-08  9:56 ` [PATCH v2 8/8] qedi: Add support for handling the pcie errors Manish Rangankar
2020-09-09  2:42 ` [PATCH v2 0/8] qedi: Misc bug fixes and enhancements Martin K. Petersen
2020-09-15 20:16 ` Martin K. Petersen

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