[Nouveau] [PATCH] drm/nouveau/dmem: missing mutex_lock in error path

[Jason Gunthorpe]

On Thu, Jun 13, 2019 at 05:11:21PM -0700, Ralph Campbell wrote:
> In nouveau_dmem_pages_alloc(), the drm->dmem->mutex is unlocked before
> calling nouveau_dmem_chunk_alloc().
> Reacquire the lock before continuing to the next page.
> 
> Signed-off-by: Ralph Campbell <rcampbell at nvidia.com>
> ---
> 
> I found this while testing Jason Gunthorpe's hmm tree but this is
> independant of those changes. I guess it could go through
> David Airlie's tree for nouveau or Jason's tree.

This seems like a bad enough bug to send it into -rc?

It probably should go through the normal nouveau channels, thanks

Jason