[PATCH] ARM: imx_v7_defconfig: Limit TFTP window size

[Sascha Hauer]

The FEC ethernet controller is too slow to catch up with a gigabit
link. This hasn't been a problem until now, because the protocols
we use in barebox only have a single packet in flight. With TFTP
window size support and a gigabit link though we get receive
buffer overruns resulting in messages like:

WARNING: eth0: error frame: 0x2feca098 0x00000806

The resulting speed is slower than without TFTP windowsize support due
to the necessary retransmits. Limit the window size to a value that
seems to be working on i.MX6 boards.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 arch/arm/configs/imx_v7_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/imx_v7_defconfig b/arch/arm/configs/imx_v7_defconfig
index df2304eae9..d07abe28ae 100644
--- a/arch/arm/configs/imx_v7_defconfig
+++ b/arch/arm/configs/imx_v7_defconfig
@@ -210,6 +210,7 @@ CONFIG_GENERIC_PHY=y
 CONFIG_USB_NOP_XCEIV=y
 CONFIG_FS_EXT4=y
 CONFIG_FS_TFTP=y
+CONFIG_FS_TFTP_MAX_WINDOW_SIZE=8
 CONFIG_FS_NFS=y
 CONFIG_FS_FAT=y
 CONFIG_FS_FAT_WRITE=y
-- 
2.30.2