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ethercat
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reserve extra headroom in tx buffer for genet

This commit is contained in:
Bjarne von Horn 2023-08-30 16:08:59 +02:00
parent d9e12d8d82
commit 758b4adc99
1 changed files with 7 additions and 2 deletions
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9
master/device.c
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@ -56,6 +56,11 @@
/*****************************************************************************/
enum {
/* genet driver needs extra headroom in skb for status block */
EXTRA_HEADROOM = 64,
};
/** Constructor.
*
* \return 0 in case of success, else < 0
@ -127,14 +132,14 @@ int ec_device_init(
#endif
for (i = 0; i < EC_TX_RING_SIZE; i++) {
if (!(device->tx_skb[i] = dev_alloc_skb(ETH_FRAME_LEN))) {
if (!(device->tx_skb[i] = dev_alloc_skb(ETH_FRAME_LEN + EXTRA_HEADROOM))) {
EC_MASTER_ERR(master, "Error allocating device socket buffer!\n");
ret = -ENOMEM;
goto out_tx_ring;
}
// add Ethernet-II-header
skb_reserve(device->tx_skb[i], ETH_HLEN);
skb_reserve(device->tx_skb[i], ETH_HLEN + EXTRA_HEADROOM);
eth = (struct ethhdr *) skb_push(device->tx_skb[i], ETH_HLEN);
eth->h_proto = htons(0x88A4);
memset(eth->h_dest, 0xFF, ETH_ALEN);