e1000: fix descriptor overflow

Allow rxq->rx_tail + offset > 65535
in eth_em_rx_descriptor_done().

Signed-off-by: Intel

diff --git a/lib/librte_pmd_e1000/em_rxtx.c b/lib/librte_pmd_e1000/em_rxtx.c
index 0bebfe2..c049542 100644 (file)
--- a/lib/librte_pmd_e1000/em_rxtx.c
+++ b/lib/librte_pmd_e1000/em_rxtx.c
@@ -1449,7 +1449,7 @@ eth_em_rx_descriptor_done(void *rx_queue, uint16_t offset)
 {
        volatile struct e1000_rx_desc *rxdp;
        struct em_rx_queue *rxq = rx_queue;
-       uint16_t desc;
+       uint32_t desc;
 
        if (unlikely(offset >= rxq->nb_rx_desc))
                return 0;