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hw/net: e1000: Remove the logic of padding short frames in the receive path

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Now that we have implemented unified short frames padding in the
QEMU networking codes, remove the same logic in the NIC codes.

This actually reverts commit 78aeb23ede.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Bin Meng 2023-06-25 09:53:13 +08:00 • committed by Jason Wang
parent 4271f40383
commit 140eae9c8f
1 changed files with 1 additions and 10 deletions
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11
hw/net/e1000.c
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@ -888,7 +888,6 @@ e1000_receive_iov(NetClientState *nc, const struct iovec *iov, int iovcnt)
uint16_t vlan_special = 0;
uint8_t vlan_status = 0;
uint8_t min_buf[ETH_ZLEN];
struct iovec min_iov;
uint8_t *filter_buf = iov->iov_base;
size_t size = iov_size(iov, iovcnt);
size_t iov_ofs = 0;
@ -905,15 +904,7 @@ e1000_receive_iov(NetClientState *nc, const struct iovec *iov, int iovcnt)
return 0;
}
/* Pad to minimum Ethernet frame length */
if (size < sizeof(min_buf)) {
iov_to_buf(iov, iovcnt, 0, min_buf, size);
memset(&min_buf[size], 0, sizeof(min_buf) - size);
min_iov.iov_base = filter_buf = min_buf;
min_iov.iov_len = size = sizeof(min_buf);
iovcnt = 1;
iov = &min_iov;
} else if (iov->iov_len < MAXIMUM_ETHERNET_HDR_LEN) {
if (iov->iov_len < MAXIMUM_ETHERNET_HDR_LEN) {
/* This is very unlikely, but may happen. */
iov_to_buf(iov, iovcnt, 0, min_buf, MAXIMUM_ETHERNET_HDR_LEN);
filter_buf = min_buf;