[alsa-devel] [PATCH] add Steinberg UR44 USB Audio Interface support to quirks-table

[Takashi Iwai]

At Thu, 06 Nov 2014 08:05:43 -0800,
Cyrus Harmon wrote:
> 
> 
> On a somewhat related note, is there a way to apply changes to things 
> in, say, sound/usb and compile/install those changes without a few 
> kernel rebuild/install? Or, even better, without a reboot? Would 
> certainly shorting the debug cycle time for me. In this case I'm 
> interested in finding out what quirk->type is when it gets to 
> snd_usb_create_quirk as it looks like the function in the quirk_funcs 
> table that gets called here produces the first suspect error. Adding a 
> dev_info, followed by a kernel rebuild, reinstall, reboot (and the fact 
> that my broken nvidia drivers require reinstalling the video driver 
> every time I install a new kernel) makes for a tedious process!

It's a standard procedure, something like...

	% mkdir /somewhere
	% cd /somewhere
	% cp -a /there/linux/sound .
	% patch -p1 < your-usb.patch
	% make -C /lib/modules/`uname -r`/build M=$PWD/sound/usb
	% su
	# make -C /lib/modules/`uname -r`/build M=$PWD/sound/usb modules_install
	# modprobe -r snd-usb-audio
	# modprobe snd-usb-audio


Takashi