Re: loading firmware while usermodehelper disabled.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> On Sun, 1 Jan 2012 20:39:45 +0000
> 
> Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote:
> > When you suspend the power gets killed so the device loses its firmware
> > and goes back to being a firmware requesting thing on resume.
> > 
> > Worse still - you don't easily know if the device is in fact new and was
> > added while suspended, or was always there.
> > 
> > So for those devices you do need to load the firmware into them
> > automatically after the resume to work out what they are and get the MAC
> > to see if its the same wireless card or not.
> 
> Well, that does not prevent you from caching the firmware once you
> got it from userspace and keep it until module unload (or probably device
> close), so that it is already available on resume.

That's actually wrong. If you cached every single firmware, the kernel would 
gulp down a lot of space that can't be swapped out!

M
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux