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scsi: qedi: Mark all connections for recovery on link down event 

For short time cable pulls, the in-flight I/O to the firmware is never
cleaned up, resulting in the behaviour of stale I/O completion causing
list_del corruption and soft lockup of the system.

On link down event, mark all the connections for recovery, causing cleanup
of all the in-flight I/O immediately.

Link: https://lore.kernel.org/r/20200908095657.26821-7-mrangankar@marvell.com
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Manish Rangankar <mrangankar@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Nilesh Javali 2020-09-08 02:56:55 -07:00 committed by Martin K. Petersen
parent 5a2e69af16
commit 4118879be3
1 changed files with 10 additions and 0 deletions
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10
drivers/scsi/qedi/qedi_main.c
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@ -1126,6 +1126,15 @@ static void qedi_schedule_recovery_handler(void *dev)
schedule_delayed_work(&qedi->recovery_work, 0);
}
static void qedi_set_conn_recovery(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *session = cls_session->dd_data;
struct iscsi_conn *conn = session->leadconn;
struct qedi_conn *qedi_conn = conn->dd_data;
qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
}
static void qedi_link_update(void *dev, struct qed_link_output *link)
{
struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
@ -1137,6 +1146,7 @@ static void qedi_link_update(void *dev, struct qed_link_output *link)
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Link Down event.\n");
atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
iscsi_host_for_each_session(qedi->shost, qedi_set_conn_recovery);
}
}