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net: Remove CONFIG_BOOTP_DHCP_REQUEST_DELAY

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This option is not in use anywhere and the documentation implies it's
for some very old and unlikely to be seen currently issues.  Rather than
update the code so the CONFIG symbol could be easily in Kconfig, remove
the code.

Cc: Ramon Fried <rfried.dev@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Tom Rini 2022-02-25 11:19:51 -05:00
parent a542e4307d
commit f0171e7ea7
2 changed files with 0 additions and 17 deletions
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14
README
View File

@ -1173,20 +1173,6 @@ The following options need to be configured:
- DHCP Advanced Options:
CONFIG_BOOTP_DHCP_REQUEST_DELAY
A 32bit value in microseconds for a delay between
receiving a "DHCP Offer" and sending the "DHCP Request".
This fixes a problem with certain DHCP servers that don't
respond 100% of the time to a "DHCP request". E.g. On an
AT91RM9200 processor running at 180MHz, this delay needed
to be *at least* 15,000 usec before a Windows Server 2003
DHCP server would reply 100% of the time. I recommend at
least 50,000 usec to be safe. The alternative is to hope
that one of the retries will be successful but note that
the DHCP timeout and retry process takes a longer than
this delay.
- Link-local IP address negotiation:
Negotiate with other link-local clients on the local network
for an address that doesn't require explicit configuration.

3
net/bootp.c
View File

@ -1038,9 +1038,6 @@ static void dhcp_send_request_packet(struct bootp_hdr *bp_offer)
bcast_ip.s_addr = 0xFFFFFFFFL;
net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
#ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
#endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
net_send_packet(net_tx_packet, pktlen);
}