cxgb4: fix a memory leak bug

In blocked_fl_write(), 't' is not deallocated if bitmap_parse_user() fails,
leading to a memory leak bug. To fix this issue, free t before returning
the error.

Signed-off-by: Wenwen Wang <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c

···
 		return -ENOMEM;
 
 	err = bitmap_parse_user(ubuf, count, t, adap->sge.egr_sz);
-	if (err)
+	if (err) {
+		kvfree(t);
 		return err;
+	}
 
 	bitmap_copy(adap->sge.blocked_fl, t, adap->sge.egr_sz);
 	kvfree(t);