scsi: qla2xxx: Clear cmds after chip reset

Commit aefed3e5548f ("scsi: qla2xxx: target: Fix offline port handling
and host reset handling") caused two problems:

1. Commands sent to FW, after chip reset got stuck and never freed as FW
   is not going to respond to them anymore.

2. BUG_ON(cmd->sg_mapped) in qlt_free_cmd().  Commit 26f9ce53817a
   ("scsi: qla2xxx: Fix missed DMA unmap for aborted commands")
   attempted to fix this, but introduced another bug under different
   circumstances when two different CPUs were racing to call
   qlt_unmap_sg() at the same time: BUG_ON(!valid_dma_direction(dir)) in
   dma_unmap_sg_attrs().

So revert "scsi: qla2xxx: Fix missed DMA unmap for aborted commands" and
partially revert "scsi: qla2xxx: target: Fix offline port handling and
host reset handling" at __qla2x00_abort_all_cmds.

Fixes: aefed3e5548f ("scsi: qla2xxx: target: Fix offline port handling and host reset handling")
Fixes: 26f9ce53817a ("scsi: qla2xxx: Fix missed DMA unmap for aborted commands")
Co-developed-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Link: https://patch.msgid.link/0e7e5d26-e7a0-42d1-8235-40eeb27f3e98@cybernetics.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 848ee6c88311bc330e58a2e05d592468e50ab4f9..fd32b30a5b38b2d9c5c2212b98330ba24395bf73 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -1875,10 +1875,26 @@ __qla2x00_abort_all_cmds(struct qla_qpair *qp, int res)
                                        continue;
                                }
                                cmd = (struct qla_tgt_cmd *)sp;
-                               cmd->aborted = 1;
+
+                               if (cmd->sg_mapped)
+                                       qlt_unmap_sg(vha, cmd);
+
+                               if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
+                                       cmd->aborted = 1;
+                                       cmd->write_data_transferred = 0;
+                                       cmd->state = QLA_TGT_STATE_DATA_IN;
+                                       ha->tgt.tgt_ops->handle_data(cmd);
+                               } else {
+                                       ha->tgt.tgt_ops->free_cmd(cmd);
+                               }
                                break;
                        case TYPE_TGT_TMCMD:
-                               /* Skip task management functions. */
+                               /*
+                                * Currently, only ABTS response gets on the
+                                * outstanding_cmds[]
+                                */
+                               ha->tgt.tgt_ops->free_mcmd(
+                                       (struct qla_tgt_mgmt_cmd *) sp);
                                break;
                        default:
                                break;

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index b700bfc642b377ae0790654b519a8cced5301458..2abdb8ce0302c68481d3fa938831353fa1574837 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -2447,7 +2447,7 @@ out_err:
        return -1;
 }
 
-static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
+void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
 {
        struct qla_hw_data *ha;
        struct qla_qpair *qpair;
@@ -3795,9 +3795,6 @@ int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
 
        spin_lock_irqsave(&cmd->cmd_lock, flags);
        if (cmd->aborted) {
-               if (cmd->sg_mapped)
-                       qlt_unmap_sg(vha, cmd);
-
                spin_unlock_irqrestore(&cmd->cmd_lock, flags);
                /*
                 * It's normal to see 2 calls in this path:

diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h
index 15a59c125c532482f7c556b8f63038b62667c4bd..c483966d0a847424bde79637eb95b256b5ea7fdc 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_target.h
+++ b/drivers/scsi/qla2xxx/qla_target.h
@@ -1058,6 +1058,7 @@ extern int qlt_abort_cmd(struct qla_tgt_cmd *);
 extern void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *);
 extern void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *);
 extern void qlt_free_cmd(struct qla_tgt_cmd *cmd);
+extern void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd);
 extern void qlt_async_event(uint16_t, struct scsi_qla_host *, uint16_t *);
 extern void qlt_enable_vha(struct scsi_qla_host *);
 extern void qlt_vport_create(struct scsi_qla_host *, struct qla_hw_data *);