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Kernel: Only set tx buffer address once in rtl8139 driver

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This commit is contained in:
Conrad Pankoff 2019-09-03 23:14:28 +10:00 committed by Andreas Kling
parent 7c9adcf24e
commit c8fa95b8cd
Notes: sideshowbarker 2024-07-19 17:44:32 +09:00 
Author: https://github.com/deoxxa
Commit: https://github.com/SerenityOS/serenity/commit/c8fa95b8cdf
Pull-request: https://github.com/SerenityOS/serenity/pull/515
1 changed files with 3 additions and 1 deletions
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4
Kernel/Net/RTL8139NetworkAdapter.cpp
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@ -245,6 +245,9 @@ void RTL8139NetworkAdapter::reset()
// bytes, interframe gap time of the only allowable value. the DMA burst
// size is important - silent failures have been observed with 2048 bytes.
out32(REG_TXCFG, TXCFG_TXRR_ZERO | TXCFG_MAX_DMA_1K | TXCFG_IFG11);
// tell the chip where we want it to DMA from for outgoing packets.
for (int i = 0; i < 4; i++)
out32(REG_TXADDR0 + (i * 4), m_tx_buffer_addr[i]);
// re-lock config registers
out8(REG_CFG9346, CFG9346_NONE);
// enable rx/tx again in case they got turned off (apparently some cards
@ -299,7 +302,6 @@ void RTL8139NetworkAdapter::send_raw(const u8* data, int length)
memcpy((void*)(m_tx_buffer_addr[hw_buffer]), data, length);
memset((void*)(m_tx_buffer_addr[hw_buffer] + length), 0, TX_BUFFER_SIZE - length);
out32(REG_TXADDR0 + (hw_buffer * 4), m_tx_buffer_addr[hw_buffer]);
out32(REG_TXSTATUS0 + (hw_buffer * 4), length);
}