net: lan743x: Add set RFE read fifo threshold for PCI1x1x chips
authorRaju Lakkaraju <Raju.Lakkaraju@microchip.com>
Tue, 26 Mar 2024 06:58:05 +0000 (12:28 +0530)
committerPaolo Abeni <pabeni@redhat.com>
Thu, 28 Mar 2024 10:36:10 +0000 (11:36 +0100)
commite4a58989f5c839316ac63675e8800b9eed7dbe96
tree594871e071d8776ac6219889887ec02940893049
parenteb67cdb33fb493160c062add2eb95d4b2aac08d5
net: lan743x: Add set RFE read fifo threshold for PCI1x1x chips

PCI11x1x Rev B0 devices might drop packets when receiving back to back frames
at 2.5G link speed. Change the B0 Rev device's Receive filtering Engine FIFO
threshold parameter from its hardware default of 4 to 3 dwords to prevent the
problem. Rev C0 and later hardware already defaults to 3 dwords.

Fixes: bb4f6bffe33c ("net: lan743x: Add PCI11010 / PCI11414 device IDs")
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240326065805.686128-1-Raju.Lakkaraju@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
drivers/net/ethernet/microchip/lan743x_main.c
drivers/net/ethernet/microchip/lan743x_main.h