Re: [PATCH 4/5] kselftest/alsa: mixer-test: Skip write tests for volatile controls

[Takashi Iwai <tiwai@xxxxxxx>]

On Fri, 14 Jun 2024 16:29:03 +0200,
Mark Brown wrote:
> 
> On Fri, Jun 14, 2024 at 02:47:26PM +0200, Takashi Iwai wrote:
> 
> > The control elements with volatile flag don't guarantee that the
> > written values are actually saved for the next reads, hence they
> > aren't suitable for the standard mixer tests.  Skip the write tests
> > for those volatile controls for avoiding confusion.
> 
> We should still verify that you can actually write I think...
> 
> > +	if (!snd_ctl_elem_info_is_volatile(ctl->info)) {
> > +		ksft_print_msg("%s is volatile\n", ctl->name);
> > +		ksft_test_result_skip("write_invalid.%d.%d\n",
> > +				      ctl->card->card, ctl->elem);
> > +		return;
> > +	}
> 
> ...and that you don't read back invalid values after a write like this
> for example.  I think any change for this should be in the validation of
> the read but we should still try the writes we think we can do.

OK, makes sense.  Will respin this one.


thanks,

Takashi