net/tap: remove minimum packet size in Rx

With support for segmented packets, it is now possible to easily receive
packets of many sizes, given an adequate number of descriptors.

Remove limitation on the minimum size of mbuf: on reception, if a packet
won't fit in the queue's mbufs, it will be detected in the packet info
and the packet will be discarded.

Fixes: 0781f5762cfe ("net/tap: support segmented mbufs")

Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 6567bba..d8322e8 100644 (file)
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -860,7 +860,6 @@ tap_rx_queue_setup(struct rte_eth_dev *dev,
        struct rte_mbuf **tmp = &rxq->pool;
        struct iovec (*iovecs)[nb_rx_desc + 1];
        int data_off = RTE_PKTMBUF_HEADROOM;
-       uint16_t buf_size;
        int ret = 0;
        int fd;
        int i;
@@ -886,18 +885,6 @@ tap_rx_queue_setup(struct rte_eth_dev *dev,
        }
        rxq->iovecs = iovecs;
 
-       /* Now get the space available for data in the mbuf */
-       buf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
-                               RTE_PKTMBUF_HEADROOM);
-
-       if (buf_size < ETH_FRAME_LEN) {
-               RTE_LOG(WARNING, PMD,
-                       "%s: %d bytes will not fit in mbuf (%d bytes)\n",
-                       dev->data->name, ETH_FRAME_LEN, buf_size);
-               ret = -ENOMEM;
-               goto error;
-       }
-
        fd = rx_setup_queue(dev, internals, rx_queue_id);
        if (fd == -1) {
                ret = fd;