scsi: mpt3sas: Fix event callback log_code value handling

In mpt3sas_scsih_event_callback(), fix a sparse warning when testing the
event log code value by replacing the use of a pointer to the address
storing the event log code with a log code local variable. Doing so,
le32_to_cpu() is used when the log code value is assigned, avoiding a
sparse warning.

Link: https://lore.kernel.org/r/20220307234854.148145-5-damien.lemoal@opensource.wdc.comSigned-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_scsih.c

@@ -10926,20 +10926,20 @@ mpt3sas_scsih_event_callback(struct MPT3SAS_ADAPTER *ioc, u8 msix_index,
 	case MPI2_EVENT_LOG_ENTRY_ADDED:
 	{
 		Mpi2EventDataLogEntryAdded_t *log_entry;
-		u32 *log_code;
+		u32 log_code;
 
 		if (!ioc->is_warpdrive)
 			break;
 
 		log_entry = (Mpi2EventDataLogEntryAdded_t *)
 		    mpi_reply->EventData;
-		log_code = (u32 *)log_entry->LogData;
+		log_code = le32_to_cpu(*(__le32 *)log_entry->LogData);
 
 		if (le16_to_cpu(log_entry->LogEntryQualifier)
 		    != MPT2_WARPDRIVE_LOGENTRY)
 			break;
 
-		switch (le32_to_cpu(*log_code)) {
+		switch (log_code) {
 		case MPT2_WARPDRIVE_LC_SSDT:
 			ioc_warn(ioc, "WarpDrive Warning: IO Throttling has occurred in the WarpDrive subsystem. Check WarpDrive documentation for additional details.\n");
 			break;