[Scst-svn] [master] qla2x00t-32gbit: Fix erroneous link up failure

[Gleb C. <lna...@ya...>]

Commit: e9ff9ea
GitHub URL: https://github.com/SCST-project/scst/commit/e9ff9ea91c5699c31ec7ee3e90bd059e3997999d
Author: Gleb Chesnokov
Date: 2023-10-10T14:51:33+03:00
Log Message:
-----------
qla2x00t-32gbit: Fix erroneous link up failure

Link up failure occurred where driver failed to see certain events from FW
indicating link up (AEN 8011) and fabric login completion (AEN 8014).
Without these 2 events, driver would not proceed forward to scan the
fabric. The cause of this is due to delay in the receive of interrupt for
Mailbox 60 that causes qla to set the fw_started flag late.  The late
setting of this flag causes other interrupts to be dropped.  These dropped
interrupts happen to be the link up (AEN 8011) and fabric login completion
(AEN 8014).

Set fw_started flag early to prevent interrupts being dropped.

Cc: st...@vg...
Signed-off-by: Quinn Tran <qu...@ma...>
Signed-off-by: Nilesh Javali <nj...@ma...>
Link: https://lore.kernel.org/r/202...@ma...
Reviewed-by: Himanshu Madhani <him...@or...>
Signed-off-by: Martin K. Petersen <mar...@or...>
[ commit 5b51f35d127e upstream ]

Modified Paths:
--------------
 qla2x00t-32gbit/qla_init.c | 3 ++-
 qla2x00t-32gbit/qla_isr.c  | 6 +++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

===================================================================
diff --git a/qla2x00t-32gbit/qla_init.c b/qla2x00t-32gbit/qla_init.c
index 9215278..1370138 100644
--- a/qla2x00t-32gbit/qla_init.c
+++ b/qla2x00t-32gbit/qla_init.c
@@ -4818,15 +4818,16 @@ qla2x00_init_rings(scsi_qla_host_t *vha)
 	if (ha->flags.edif_enabled)
 		mid_init_cb->init_cb.frame_payload_size = cpu_to_le16(ELS_MAX_PAYLOAD);
 
+	QLA_FW_STARTED(ha);
 	rval = qla2x00_init_firmware(vha, ha->init_cb_size);
 next_check:
 	if (rval) {
+		QLA_FW_STOPPED(ha);
 		ql_log(ql_log_fatal, vha, 0x00d2,
 		    "Init Firmware **** FAILED ****.\n");
 	} else {
 		ql_dbg(ql_dbg_init, vha, 0x00d3,
 		    "Init Firmware -- success.\n");
-		QLA_FW_STARTED(ha);
 		vha->u_ql2xexchoffld = vha->u_ql2xiniexchg = 0;
 	}
 
diff --git a/qla2x00t-32gbit/qla_isr.c b/qla2x00t-32gbit/qla_isr.c
index a238f3f..4f56974 100644
--- a/qla2x00t-32gbit/qla_isr.c
+++ b/qla2x00t-32gbit/qla_isr.c
@@ -1133,8 +1133,12 @@ qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
 	unsigned long	flags;
 	fc_port_t	*fcport = NULL;
 
-	if (!vha->hw->flags.fw_started)
+	if (!vha->hw->flags.fw_started) {
+		ql_log(ql_log_warn, vha, 0x50ff,
+		    "Dropping AEN - %04x %04x %04x %04x.\n",
+		    mb[0], mb[1], mb[2], mb[3]);
 		return;
+	}
 
 	/* Setup to process RIO completion. */
 	handle_cnt = 0;