iwlwifi: dbg_ini: set dump bit only when trigger collection is certain

In case the the trigger occurrences is zero or force_restart is set, the
driver sets IWL_FWRT_STATUS_DUMPING without actually scheduling trigger
collection. At this point no other dump collection can be performed.

Solve this by setting IWL_FWRT_STATUS_DUMPING bit only when the driver
is surely going to schedule dump collection
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/dbg.c

@@ -2145,6 +2145,9 @@ int _iwl_fw_dbg_ini_collect(struct iwl_fw_runtime *fwrt,
 		return 0;
 	}
 
+	if (test_and_set_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status))
+		return -EBUSY;
+
 	fwrt->dump.ini_trig_id = id;
 
 	IWL_WARN(fwrt, "WRT: collecting data: ini trigger %d fired.\n", id);