s390/hmcdrv: free memory on error path

Free allocated page in case of error returned by hmcdrv_ftp_startup.

[[e-mail]]: slightly changed Christophe's patch

Signed-off-by: Christophe Jaillet <[e-mail]>
Signed-off-by: Heiko Carstens <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>

drivers/s390/char/hmcdrv_ftp.c

···
 	rc = hmcdrv_ftp_startup();
 
 	if (rc)
-		return rc;
+		goto out;
 
 	rc = hmcdrv_ftp_do(&ftp);
-	free_page((unsigned long) ftp.buf);
 	hmcdrv_ftp_shutdown();
 
 	switch (rc) {
···
 			rc = 0; /* clear length (success) */
 		break;
 	} /* switch */
-
+out:
+	free_page((unsigned long) ftp.buf);
 	return rc;
 }
 EXPORT_SYMBOL(hmcdrv_ftp_probe);