sfc: Make efx_mcdi_{init,fini}() call efx_mcdi_drv_attach()

This should be done during MCDI initialisation for any NIC.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/mcdi.c

@@ -48,6 +48,8 @@ struct efx_mcdi_async_param {
 };
 
 static void efx_mcdi_timeout_async(unsigned long context);
+static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
+			       bool *was_attached_out);
 
 static inline struct efx_mcdi_iface *efx_mcdi(struct efx_nic *efx)
 {
@@ -58,6 +60,8 @@ static inline struct efx_mcdi_iface *efx_mcdi(struct efx_nic *efx)
 int efx_mcdi_init(struct efx_nic *efx)
 {
 	struct efx_mcdi_iface *mcdi;
+	bool already_attached;
+	int rc;
 
 	efx->mcdi = kzalloc(sizeof(*efx->mcdi), GFP_KERNEL);
 	if (!efx->mcdi)
@@ -78,12 +82,37 @@ int efx_mcdi_init(struct efx_nic *efx)
 	mcdi->new_epoch = true;
 
 	/* Recover from a failed assertion before probing */
-	return efx_mcdi_handle_assertion(efx);
+	rc = efx_mcdi_handle_assertion(efx);
+	if (rc)
+		return rc;
+
+	/* Let the MC (and BMC, if this is a LOM) know that the driver
+	 * is loaded. We should do this before we reset the NIC.
+	 */
+	rc = efx_mcdi_drv_attach(efx, true, &already_attached);
+	if (rc) {
+		netif_err(efx, probe, efx->net_dev,
+			  "Unable to register driver with MCPU\n");
+		return rc;
+	}
+	if (already_attached)
+		/* Not a fatal error */
+		netif_err(efx, probe, efx->net_dev,
+			  "Host already registered with MCPU\n");
+
+	return 0;
 }
 
 void efx_mcdi_fini(struct efx_nic *efx)
 {
-	BUG_ON(efx->mcdi && efx->mcdi->iface.state != MCDI_STATE_QUIESCENT);
+	if (!efx->mcdi)
+		return;
+
+	BUG_ON(efx->mcdi->iface.state != MCDI_STATE_QUIESCENT);
+
+	/* Relinquish the device (back to the BMC, if this is a LOM) */
+	efx_mcdi_drv_attach(efx, false, NULL);
+
 	kfree(efx->mcdi);
 }
 
@@ -889,8 +918,8 @@ void efx_mcdi_print_fwver(struct efx_nic *efx, char *buf, size_t len)
 	buf[0] = 0;
 }
 
-int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
-			bool *was_attached)
+static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
+			       bool *was_attached)
 {
 	MCDI_DECLARE_BUF(inbuf, MC_CMD_DRV_ATTACH_IN_LEN);
 	MCDI_DECLARE_BUF(outbuf, MC_CMD_DRV_ATTACH_OUT_LEN);

drivers/net/ethernet/sfc/mcdi.h

@@ -273,8 +273,6 @@ extern void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev);
 	EFX_QWORD_FIELD(_ev, MCDI_EVENT_ ## _field)
 
 extern void efx_mcdi_print_fwver(struct efx_nic *efx, char *buf, size_t len);
-extern int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
-			       bool *was_attached_out);
 extern int efx_mcdi_get_board_cfg(struct efx_nic *efx, u8 *mac_address,
 				  u16 *fw_subtype_list, u32 *capabilities);
 extern int efx_mcdi_log_ctrl(struct efx_nic *efx, bool evq, bool uart,

drivers/net/ethernet/sfc/siena.c

@@ -196,7 +196,6 @@ static unsigned int siena_mem_map_size(struct efx_nic *efx)
 static int siena_probe_nic(struct efx_nic *efx)
 {
 	struct siena_nic_data *nic_data;
-	bool already_attached = false;
 	efx_oword_t reg;
 	int rc;
 
@@ -222,19 +221,6 @@ static int siena_probe_nic(struct efx_nic *efx)
 	if (rc)
 		goto fail1;
 
-	/* Let the BMC know that the driver is now in charge of link and
-	 * filter settings. We must do this before we reset the NIC */
-	rc = efx_mcdi_drv_attach(efx, true, &already_attached);
-	if (rc) {
-		netif_err(efx, probe, efx->net_dev,
-			  "Unable to register driver with MCPU\n");
-		goto fail2;
-	}
-	if (already_attached)
-		/* Not a fatal error */
-		netif_err(efx, probe, efx->net_dev,
-			  "Host already registered with MCPU\n");
-
 	/* Now we can reset the NIC */
 	rc = efx_mcdi_reset(efx, RESET_TYPE_ALL);
 	if (rc) {
@@ -281,8 +267,6 @@ static int siena_probe_nic(struct efx_nic *efx)
 	efx_nic_free_buffer(efx, &efx->irq_status);
 fail4:
 fail3:
-	efx_mcdi_drv_attach(efx, false, NULL);
-fail2:
 	efx_mcdi_fini(efx);
 fail1:
 	kfree(efx->nic_data);
@@ -371,14 +355,11 @@ static void siena_remove_nic(struct efx_nic *efx)
 
 	efx_mcdi_reset(efx, RESET_TYPE_ALL);
 
-	/* Relinquish the device back to the BMC */
-	efx_mcdi_drv_attach(efx, false, NULL);
+	efx_mcdi_fini(efx);
 
 	/* Tear down the private nic state */
 	kfree(efx->nic_data);
 	efx->nic_data = NULL;
-
-	efx_mcdi_fini(efx);
 }
 
 #define SIENA_DMA_STAT(ext_name, mcdi_name)			\