[SCSI] bfa: Introduce a link notification state machine.

Introduce a link notification state machine to handle next incoming
link events while the current event is being delivered to the driver.

When the event has been processed by the driver, the link notification
state machine will queue the next event (if there is any) to the
driver.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/scsi/bfa/bfa_port_priv.h b/drivers/scsi/bfa/bfa_port_priv.h
index 51f698a06b6d..f29701bd2369 100644
--- a/drivers/scsi/bfa/bfa_port_priv.h
+++ b/drivers/scsi/bfa/bfa_port_priv.h
@@ -23,6 +23,16 @@
 #include "bfa_intr_priv.h"
 
 /**
+ * Link notification data structure
+ */
+struct bfa_pport_ln_s {
+	struct bfa_pport_s     *pport;
+	bfa_sm_t                sm;
+	struct bfa_cb_qe_s      ln_qe;  /*  BFA callback queue elem for ln */
+	enum bfa_pport_linkstate ln_event; /*  ln event for callback */
+};
+
+/**
  * BFA physical port data structure
  */
 struct bfa_pport_s {
@@ -52,9 +62,8 @@ struct bfa_pport_s {
 		union bfi_pport_i2h_msg_u i2hmsg;
 	} event_arg;
 	void			*bfad;	/*  BFA driver handle */
+	struct bfa_pport_ln_s   ln; /* Link Notification */
 	struct bfa_cb_qe_s		hcb_qe;	/*  BFA callback queue elem */
-	enum bfa_pport_linkstate	hcb_event;
-					/*  link event for callback */
 	u32		msgtag;	/*  fimrware msg tag for reply */
 	u8			*stats_kva;
 	u64		stats_pa;