[SCSI] esas2r: smatch - Fix dereference that occurs prior to check

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bradley Grove <bgrove@attotech.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/esas2r/esas2r_flash.c

@@ -860,8 +860,13 @@ bool esas2r_process_fs_ioctl(struct esas2r_adapter *a,
 		return false;
 	}
 
+	if (fsc->command >= cmdcnt) {
+		fs->status = ATTO_STS_INV_FUNC;
+		return false;
+	}
+
 	func = cmd_to_fls_func[fsc->command];
-	if (fsc->command >= cmdcnt || func == 0xFF) {
+	if (func == 0xFF) {
 		fs->status = ATTO_STS_INV_FUNC;
 		return false;
 	}

drivers/scsi/esas2r/esas2r_init.c

@@ -665,7 +665,7 @@ void esas2r_kill_adapter(int i)
 
 int esas2r_cleanup(struct Scsi_Host *host)
 {
-	struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
+	struct esas2r_adapter *a;
 	int index;
 
 	if (host == NULL) {
@@ -678,6 +678,7 @@ int esas2r_cleanup(struct Scsi_Host *host)
 	}
 
 	esas2r_debug("esas2r_cleanup called for host %p", host);
+	a = (struct esas2r_adapter *)host->hostdata;
 	index = a->index;
 	esas2r_kill_adapter(index);
 	return index;