We never set "slots" in this function.

Fixes: a9380b0f7be8 ("drivers: net: xgene: Add support for Jumbo frame")
Signed-off-by: Dan Carpenter <redacted>
---
I copied how slots gets set in xgene_enet_rx_frame().  Static analysis.
Not tested.

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index 6c7eea8b36af..884a334e82d0 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c

@@ -635,6 +635,7 @@ static void xgene_enet_free_pagepool(struct xgene_enet_desc_ring *buf_pool,
                return;

        dev = ndev_to_dev(buf_pool->ndev);
+       slots = buf_pool->slots - 1;
        head = buf_pool->head;

        for (i = 0; i < 4; i++) {