Re: [PATCH -next] habanalabs: use GFP_ATOMIC under spin lock

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Fri, Feb 22, 2019 at 09:11:17AM +0200, Oded Gabbay wrote:
> On Fri, Feb 22, 2019 at 9:04 AM Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > On Fri, Feb 22, 2019 at 05:46:01AM +0000, Wei Yongjun wrote:
> > > A spin lock is taken here so we should use GFP_ATOMIC.
> > >
> > > Fixes: 0feaf86d4e69 ("habanalabs: add virtual memory and MMU modules")
> > > Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
> > > ---
> > >  drivers/misc/habanalabs/memory.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/misc/habanalabs/memory.c b/drivers/misc/habanalabs/memory.c
> > > index 9236e52852c6..9e3491dc3b55 100644
> > > --- a/drivers/misc/habanalabs/memory.c
> > > +++ b/drivers/misc/habanalabs/memory.c
> > > @@ -120,7 +120,7 @@ static int alloc_device_memory(struct hl_ctx *ctx, struct hl_mem_in *args,
> > >
> > >       spin_lock(&vm->idr_lock);
> > >       handle = idr_alloc(&vm->phys_pg_pack_handles, phys_pg_pack, 1, 0,
> > > -                             GFP_KERNEL);
> > > +                             GFP_ATOMIC);
> > >       spin_unlock(&vm->idr_lock);
> > >
> > >       if (handle < 0) {
> > >
> > >
> > >
> >
> > Ah, nice catch!
> >
> > Oded, any objection to me taking this patch?
> >
> > greg k-h
> No, of course not.
> This patch is:
> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>

Great, will go queue it up now, thanks.

greg k-h