[Letux-kernel] [Gta04-owner] no wifi today (cannot load helper firmware)
andreas at kemnade.info
Mon Apr 25 00:04:42 CEST 2016
On Sun, 24 Apr 2016 11:56:26 +0200
"H. Nikolaus Schaller" <hns at goldelico.com> wrote:
> > Am 23.04.2016 um 21:26 schrieb Andreas Kemnade <andreas at kemnade.info>:
> > Hi,
> > today my wifi fails. Does not matter which partition I boot from.
I even tried the last production image on a new sd:
on a fresh sd
So no 3.7, no 3.12.7, no 4.5, no 4.6rc4 works.
Having it unpowered for some hours does not help.
> > It does even work on partitions I do no experiments with.
> > It does not work with the 3.7 kernel.
> > Bluetooth works.
> > [ 672.540863] libertas_sdio: failed to load helper firmware
> > [ 672.548522] libertas_sdio: probe of mmc1:0001:1 failed with error -84
> > I have seen this -84 somewhere...
> > EILSEQ
> Hm. Illegal byte sequence... Strange.
> > EILSEQ=EILLPHONE?
> > Does anyone else have this error and recovered from it?
> > Is it some funny race condition popping up only at some phases of the moon?
> Yes. And especially in April.
I analyzed various timestamps and logs.
I had the problem once between Apr 1 and Apr 11.
But then it was only with one kernel. I just reverted the change I made
and everything was fine.
Last known time it works was on Apr 18.
> > @hns: If I remember correctly you had this error with some 4.x? Did you recover
> > from it?
> I have not checked for a while.
> The worst thing could be that there was something broken in SDIO firmware download
> for a while which allowed to execute dangerous code in the WiFi controller (it has its
> own ARM subsystem) and has damaged it so that it now fails with any kernel or setup.
The worst thing would be some damaged pads at the Wifi chip.
Or the DM3730... But I do not notice any obvious other problems...
> But let's assume the best case...
> As far as I can see the important occurrences of EILSEQ in WiFi related code are here:
> http://lxr.free-electrons.com/source/drivers/mmc/host/mmc_spi.c#L262 (but I think we don't use mmc-spi)
Interesting is also EILSEQ
I tried also with libertas_tf.
> To find who is generating the error -84 we should add printk() backwards through the
> error path that makes libertas_sdio: probe fail.
> BTW: this looks strange:
> Maybe we have accidentially enabled CONFIG_FAIL_MMC_REQUEST?
I don't think so.
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