blparam and coherent_poolsize

[noggin]

Hi all

After getting my DVB-T2 tuner working, I thought I'd try a DVB-S2 tuner.

Installed linux-kirkwood, plugged in my USB tuner and dmesg reports :
ERROR: 256 KiB atomic DMA coherent pool is too small!
Please increase it with coherent_pool= kernel parameter!

This looks like I need to send a kernel parameter from uBoot. I installed blparam-pogoplug, but I suspect I need to do something cleverer than just :
# blparam coherent_poolsize=1M to ensure the right parameters are passed to the kernel on boot.

I'm booting from SATA. Any hints - can't find much about blparam knocking around.

[WarheadsSE]

Which device is this on? It has a SATA port.. so.. V4, GoFlex?

[noggin]

Pogoplug v4

Archlinux on SATA HD
Technisat HD USB DVB-S2 tuner on USB 2.0 port

Nothing on USB 3.0 ports or SD Card.

[WarheadsSE]

You're going to need to add that to the bootargs. See if blparam puts out "extraargs"

[noggin]

Hmm - looks like my fiddling with blparam may have stopped it booting. Time to solder a UART cable I guess…

Once I get into uBoot, what's the best way of reverting to normal? I did log my blparam stuff before I made any tweaks, so I guess resetting the environment should work?

[WarheadsSE]

Resetting the environment to what it was before you started fiddling would be A#1