qla2xxx: Abort stale cmds on qla_tgt_wq when plogi arrives

cancel any commands from initiator's s_id that are still waiting
on qla_tgt_wq when PLOGI arrives.

Cc: <stable@vger.kernel.org> # v3.18+
Signed-off-by: Alexei Potashnik <alexei@purestorage.com>
Acked-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index acb2a50..0b08beb 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -4060,6 +4060,38 @@ qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
        return sess;
 }
 
+/* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
+static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
+{
+       struct qla_tgt_sess_op *op;
+       struct qla_tgt_cmd *cmd;
+       uint32_t key;
+       int count = 0;
+
+       key = (((u32)s_id->b.domain << 16) |
+              ((u32)s_id->b.area   <<  8) |
+              ((u32)s_id->b.al_pa));
+
+       spin_lock(&vha->cmd_list_lock);
+       list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
+               uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
+               if (op_key == key) {
+                       op->aborted = true;
+                       count++;
+               }
+       }
+       list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
+               uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
+               if (cmd_key == key) {
+                       cmd->state = QLA_TGT_STATE_ABORTED;
+                       count++;
+               }
+       }
+       spin_unlock(&vha->cmd_list_lock);
+
+       return count;
+}
+
 /*
  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
  */
@@ -4093,6 +4125,9 @@ static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
        switch (iocb->u.isp24.status_subcode) {
        case ELS_PLOGI:
 
+               /* Mark all stale commands in qla_tgt_wq for deletion */
+               abort_cmds_for_s_id(vha, &port_id);
+
                if (wwn)
                        sess = qlt_find_sess_invalidate_other(tgt, wwn,
                            port_id, loop_id);