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Kernel: Make sure the E1000 network adapter keeps receiving packets

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Previously the E1000 network adapter would stop receiving further
packets when an RX buffer overrun occurred. This was the case
when connecting the adapter to a real network where enough broadcast
traffic caused the buffer to be full before the kernel had a chance
to clear the RX buffer.
This commit is contained in:
Gunnar Beutner
2021-04-26 18:33:37 +02:00
committed by Andreas Kling
parent f4a05611c6
commit addddb4880
1 changed files with 1 additions and 3 deletions
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4
Kernel/Net/E1000NetworkAdapter.cpp
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@@ -425,10 +425,8 @@ void E1000NetworkAdapter::receive()
{
auto* rx_descriptors = (e1000_tx_desc*)m_rx_descriptors_region->vaddr().as_ptr();
u32 rx_current;
for (;;) {
for (u32 i = 0; i < number_of_rx_descriptors; i++) {
rx_current = in32(REG_RXDESCTAIL) % number_of_rx_descriptors;
if (rx_current == (in32(REG_RXDESCHEAD) % number_of_rx_descriptors))
return;
rx_current = (rx_current + 1) % number_of_rx_descriptors;
if (!(rx_descriptors[rx_current].status & 1))
break;