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List:       linux-wireless
Subject:    Re: brcm4330 fails to load on newer kernels
From:       Fabio Estevam <festevam () gmail ! com>
Date:       2016-07-29 1:05:25
Message-ID: CAOMZO5BHs1XOX=7Y8Ji7bv3J8LWxiGDqGgyzuEzb2vGroDCmVA () mail ! gmail ! com
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Hi Arend,

On Thu, Jul 28, 2016 at 3:37 PM, Arend van Spriel
<arend.vanspriel@broadcom.com> wrote:

> Hi Fabio,
>
> So this is another fine example of firmware API not able to deliver. I
> think in all these kernels you have the same issue. The problem is that
> the order of events upon kernel boot is not predictable. In this case
> you have rootfs being mounted and brcmfmac getting probed as the two
> competing events. When rootfs is mounted before brcmfmac is being probed
> it works, but if brcmfmac is probed before rootfs is mounted the
> firmware request will fail. So the only reliable option for built-in
> drivers requiring firmware is to built-in the firmware into the kernel
> as well.

Thanks for your explanation.

Tried building brcmfmac as module and after doing 'modprobe brcmfmac'
the firmware is correctly loaded from the rootfs in all the kernels I
tested.

Now I just need it to load brcmfmac module automatically, but this is
a a separate issue I will investigate.

Thanks a lot for your help!

Fabio Estevam
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