[alsa-devel] Controlling the Tascam FW-1884

[Scott Bahling]

Hi Takashi,

On Fri, 2018-09-28 at 12:44 +0900, Takashi Sakamoto wrote:
> Hi Scott,
> 
> On Sep 24 2018 18:32, Scott Bahling wrote:

...

> > 
> > The kernel was unstable and the system hard locked frequently with the
> > patches enabled (with and without the GFP_KERNEL patch). But I was able
> > to map out all the controller functions to the bits in the first 16
> > quadlets. I will write up my findings and send them later.
> 
> I'm sorry but I have applied wrong changes to the remote branch for
> kernel patch. It includes three issues:
> 
> 1. call vfree() to memory object allocated by kmalloc()
> 2. bring kernel oops due to double free corruption of 'tscm->status'
> 3. invalid page mapping of 'tscm->status' to process' VMA
> 
> I pushed additional three patches. Would you please test with them?

MMAP works fine and stable with the three additional patches.

-Scott