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ar71xx: fix max frame length of the QCA955x SoCs 

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39161 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Gabor Juhos 2013-12-23 17:05:23 +00:00
parent 01fe21d196
commit 18e825e907
1 changed files with 11 additions and 0 deletions
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11
target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
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@ -981,6 +981,17 @@ void __init ath79_register_eth(unsigned int id)
pdata->has_gbit = 1; pdata->has_gbit = 1;
pdata->is_ar724x = 1; pdata->is_ar724x = 1;
/*
* Limit the maximum frame length to 4095 bytes.
* Although the documentation says that the hardware
* limit is 16383 bytes but that does not work in
* practice. It seems that the hardware only updates
* the lowest 12 bits of the packet length field
* in the RX descriptor.
*/
pdata->max_frame_len = SZ_4K - 1;
pdata->desc_pktlen_mask = SZ_16K - 1;
if (!pdata->fifo_cfg1) if (!pdata->fifo_cfg1)
pdata->fifo_cfg1 = 0x0010ffff; pdata->fifo_cfg1 = 0x0010ffff;
if (!pdata->fifo_cfg2) if (!pdata->fifo_cfg2)