[Infiniband] Fix event queue doorbell ringing on Arbel

src/drivers/infiniband/arbel.c

 	struct arbel *arbel = ib_get_drvdata ( ibdev );
 	struct arbel_event_queue *arbel_eq = &arbel->eq;
 	union arbelprm_event_entry *eqe;
+	union arbelprm_eq_doorbell_register db_reg;
 	unsigned int eqe_idx_mask;
 	unsigned int event_type;
 
 		arbel_eq->next_idx++;
 
 		/* Ring doorbell */
+		MLX_FILL_1 ( &db_reg.ci, 0, ci, arbel_eq->next_idx );
 		DBGCP ( arbel, "Ringing doorbell %08lx with %08lx\n",
 			virt_to_phys ( arbel_eq->doorbell ),
-			arbel_eq->next_idx );
-		writel ( arbel_eq->next_idx, arbel_eq->doorbell );
+			db_reg.dword[0] );
+		writel ( db_reg.dword[0], arbel_eq->doorbell );
 	}
 }
 

src/drivers/infiniband/arbel.h

 	pseudo_bit_t reserved2[0x00016];
 } __attribute__ (( packed ));
 
+struct arbelprm_eq_set_ci_st {
+	pseudo_bit_t ci[0x00020];
+} __attribute__ (( packed ));
+
 struct arbelprm_port_state_change_event_st {
 	pseudo_bit_t reserved[0x00020];
 	struct arbelprm_port_state_change_st data;
 struct MLX_DECLARE_STRUCT ( arbelprm_cq_ci_db_record );
 struct MLX_DECLARE_STRUCT ( arbelprm_event_mask );
 struct MLX_DECLARE_STRUCT ( arbelprm_event_queue_entry );
+struct MLX_DECLARE_STRUCT ( arbelprm_eq_set_ci );
 struct MLX_DECLARE_STRUCT ( arbelprm_eqc );
 struct MLX_DECLARE_STRUCT ( arbelprm_hca_command_register );
 struct MLX_DECLARE_STRUCT ( arbelprm_init_hca );
 	uint32_t dword[2];
 } __attribute__ (( packed ));
 
+union arbelprm_eq_doorbell_register {
+	struct arbelprm_eq_set_ci ci;
+	uint32_t dword[1];
+} __attribute__ (( packed ));
+
 union arbelprm_mad {
 	struct arbelprm_mad_ifc ifc;
 	union ib_mad mad;