Re: Problems loading firmware using built-in drivers with kernels that use initramfs.

[Dmitry Torokhov]

On Thu, Sep 3, 2015 at 10:23 AM, Arend van Spriel <arend@xxxxxxxxxxxx> wrote:
> On 09/03/2015 01:46 AM, Luis R. Rodriguez wrote:
>>
>> On Wed, Sep 2, 2015 at 4:29 PM, Dmitry Torokhov
>> <dmitry.torokhov@xxxxxxxxx> wrote:
>>>
>>> On Wed, Sep 2, 2015 at 4:22 PM, Luis R. Rodriguez <mcgrof@xxxxxxxx>
>>> wrote:
>>>> IMHO its just as hacky as using -EPROBE_DEFER too, but its at least
>>>> preemptively hacky. Sadly I can't think of clear and clever way for the
>>>> kernel
>>>> to know when firmware will be ready either...  Would userspace know?
>>>> Should the
>>>> kernel learn this from userspace ?
>>>
>>>
>>> Yes. Given only userspace knows when firmware is available (I could
>>> have it on a separate device and mount it at some time). So maybe
>>> userpsace should simply try and scan busses for unbound devices and
>>> tell them to re-probe when it decides that firmware is finally
>>> available.
>>
>>
>> OK, the folks wanting this mechanism can implement it then. Short of
>> that we only have hacks.
>
>
> So what does "userspace knows when firmware is available" mean here. The
> specific firmware file the driver wants or the collection of firmware files
> which may or may not have the specific firmware file the driver wants. I
> assume the latter and re-probe will fail as expected.

Right, the latter.

-- 
Dmitry
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