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For Ethernet/USB RX packets, the ASIX HW pads odd-sized packets so that they have an even size. Currently, asix_recv() does remove this padding, and asic_send() adds equivalent padding in the TX path. However, the HW does not appear to need this packing for TX packets in practical testing with "ASIX Elec. Corp. AX88x72A 000001" Vendor: 0x0b95 Product 0x7720 Version 0.1. The Linux kernel does no such padding for the TX path. Remove the padding from the TX path: * For consistency with the Linux kernel. * NVIDIA has a Tegra simulator which validates that the length of USB packets sent to an ASIX device matches the packet length value inside the packet data. Having U-Boot and the kernel do the same thing when creating the TX packets simplifies the simulator's validation. Cc: Lucas Stach <dev@lynxeye.de> Cc: Marek Vasut <marex@denx.de> Cc: Simon Glass <sjg@chromium.org> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de> Tested-by: Marek Vasut <marex@denx.de> Tested-by: Gerhard Sittig <gsi@denx.de> |
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| asix.c | ||
| Makefile | ||
| smsc95xx.c | ||
| usb_ether.c | ||