[LEDE-DEV] spi-tools failure

[Giuseppe Lippolis]

I'm trying to use spi-tools on the current LEDE snapshot, but it fails at
runtime:

root at lede:~# echo -n -e '\x80' | spi-pipe -d /dev/spidev1.0 | hexdump
SPI_IOC_MESSAGE: Invalid argument

root at lede:/tmp# strace echo -n -e '\x80' | spi-pipe -d /dev/spidev1.0 |
hexdump
execve("/bin/echo", ["echo", "-n", "-e", "\\x80"], [/* 14 vars */]) = 0
set_thread_area(0x77615e50)             = 0
set_tid_address(0x7760ed90)             = 1139
open("/etc/ld-musl-mipsel-sf.path", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1
ENOENT (No such file or directory)
open("/lib/libgcc_s.so.1", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
fstat64(3, {st_mode=S_IFREG|0644, st_size=76975, ...}) = 0
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\20(\0\0004\0\0\0"..., 936)
= 936
mmap2(NULL, 143360, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x77548000
mmap2(0x7756a000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x12000) = 0x7756a000
close(3)                                = 0
getuid()                                = 0
write(1, "\200", 1SPI_IOC_MESSAGE: Invalid argument
)                     = 1
exit_group(0)                           = ?
+++ exited with 0 +++

root at lede:/tmp# spi-pipe -v
spi-pipe - cc6a41fdcec60610703ba6db488c621c64952898

root at lede:~# uname -a
Linux lede 4.4.39 #0 Thu Dec 22 16:02:42 2016 mips GNU/Linux

Can someone confirm the problem and/or suggest a solution?
Thanks, Bye.