Re: [RFC/PATCH] mwifiex: Driver - Firmware Glitches

[Florian Achleitner <flo@fopen.at>]

On Thursday 16 April 2015 20:19:13 James Cameron wrote:
> On Thu, Apr 16, 2015 at 11:10:02AM +0200, Florian Achleitner wrote:
> > Is the necessity of frequent hardware resets a commonly known issue
> > with this chip/firmware? Anybody else experiencing these?
> 
> Yes, but how frequent?

Depends on the specific hardware. Averages follow.

> 
> > Currently, we see three different scenarios. One of them is
> > currently not answered by reset. Refer to the upcoming patch.
> > 
> > (1)  mwifiex_cmd_timeout_func: Timeout cmd .. Ok, after reset.
> 
> See this a lot during heavy testing.

Also a lot, maybe once a day in low load.

> 
> > (2)  Firmware wakeup failed.. Ok, after reset.
> 
> Never see this.

Once a day.

> 
> > (3) DNLD_CMD: host to card failed. No reset triggered. See patch.
> 
> Very rarely see this.

Also very rarely. Once a week, probably.

> 
> However, our experience may not be comparable; we are using 8787 with
> a 3.5 kernel, because we haven't the resources to use a later kernel
> or get backports working.
> 
> Also, we use WOL (wake on lan) heavily; frequent automatic suspends,
> with a GPIO wakeup in addition to the SDHCI.

We don't use WOL or suspends.

Regards,
Florian