qcacld-3.0: handle idle_timeout during SSR

Currently if host driver requests for idle shutdown and SSR is
in progress then platform driver waits for the SSR to complete and
then call the idle shutdown callback to the driver.
But as a part of SSR shutdown sequence, driver flush this idle shutdown
work and this leads to the deadlock.
To resolve this issue, below changes are required.
1) Platform driver rejects the idle shutdown request with -EBUSY
   if SSR is in progress.
2) Host driver runs this idle shutdown work after the reinit if all
   the interfaces are down.
3) Remove the work flush from shutdown sequence.

Change-Id: Icae043971715948280dbafc4023fd58bdc1cc564
CRs-Fixed: 3421819

core/hdd/src/wlan_hdd_driver_ops.c

@@ -749,9 +749,15 @@ static int __hdd_soc_recovery_reinit(struct device *dev,
 				     enum qdf_bus_type bus_type)
 {
 	int errno;
+	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 
 	hdd_info("re-probing driver");
 
+	if (!hdd_ctx) {
+		hdd_err("hdd_ctx is null!");
+		return qdf_status_to_os_return(QDF_STATUS_E_RESOURCES);
+	}
+
 	hdd_soc_load_lock(dev);
 	cds_set_driver_in_bad_state(false);
 
@@ -780,6 +786,11 @@ static int __hdd_soc_recovery_reinit(struct device *dev,
 		hdd_handle_cached_commands();
 	}
 
+	if (!hdd_is_any_interface_open(hdd_ctx)) {
+		hdd_debug("restarting idle shutdown timer");
+		hdd_psoc_idle_timer_start(hdd_ctx);
+	}
+
 	hdd_soc_load_unlock(dev);
 	hdd_send_driver_ready_to_user();
 

core/hdd/src/wlan_hdd_main.c

@@ -12582,7 +12582,8 @@ static void hdd_psoc_idle_timeout_callback(void *priv)
 	}
 
 	/* Clear the recovery flag for PCIe discrete soc after idle shutdown*/
-	if (PLD_BUS_TYPE_PCIE == pld_get_bus_type(hdd_ctx->parent_dev))
+	if (PLD_BUS_TYPE_PCIE == pld_get_bus_type(hdd_ctx->parent_dev) &&
+	    -EBUSY != ret)
 		cds_set_recovery_in_progress(false);
 }