On Thu, May 14, 2020 at 09:25:18AM +0200, Thomas Zimmermann wrote:
> Hi,
>
> given the upcoming removal of this file, I don't know if you really want
> to merge this patch. If so, please see my comment on patch 6 and
Yeah I can wait for your patch to land, I just looked at that series. I'm
kinda just keeping this around as a reminder locally.
-Daniel
>
> Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
>
> Am 11.05.20 um 11:35 schrieb Daniel Vetter:
> > There's no direct harm, because for the shmem helpers these are noops
> > on imported buffers. The trouble is in the locks these take - I want
> > to change dma_buf_vmap locking, and so need to make sure that we only
> > ever take certain locks on one side of the dma-buf interface: Either
> > for exporters, or for importers.
> >
> > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> > Cc: Dave Airlie <airlied@xxxxxxxxxx>
> > Cc: Sean Paul <sean@xxxxxxxxxx>
> > Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
> > Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
> > Cc: Alex Deucher <alexander.deucher@xxxxxxx>
> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> > Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/udl/udl_gem.c | 22 ++++++++++++----------
> > 1 file changed, 12 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
> > index b6e26f98aa0a..c68d3e265329 100644
> > --- a/drivers/gpu/drm/udl/udl_gem.c
> > +++ b/drivers/gpu/drm/udl/udl_gem.c
> > @@ -46,29 +46,31 @@ static void *udl_gem_object_vmap(struct drm_gem_object *obj)
> > if (shmem->vmap_use_count++ > 0)
> > goto out;
> >
> > - ret = drm_gem_shmem_get_pages(shmem);
> > - if (ret)
> > - goto err_zero_use;
> > -
> > - if (obj->import_attach)
> > + if (obj->import_attach) {
> > shmem->vaddr = dma_buf_vmap(obj->import_attach->dmabuf);
> > - else
> > + } else {
> > + ret = drm_gem_shmem_get_pages(shmem);
> > + if (ret)
> > + goto err;
> > +
> > shmem->vaddr = vmap(shmem->pages, obj->size >> PAGE_SHIFT,
> > VM_MAP, PAGE_KERNEL);
> >
> > + if (!shmem->vaddr)
> > + drm_gem_shmem_put_pages(shmem);
> > + }
> > +
> > if (!shmem->vaddr) {
> > DRM_DEBUG_KMS("Failed to vmap pages\n");
> > ret = -ENOMEM;
> > - goto err_put_pages;
> > + goto err;
> > }
> >
> > out:
> > mutex_unlock(&shmem->vmap_lock);
> > return shmem->vaddr;
> >
> > -err_put_pages:
> > - drm_gem_shmem_put_pages(shmem);
> > -err_zero_use:
> > +err:
> > shmem->vmap_use_count = 0;
> > mutex_unlock(&shmem->vmap_lock);
> > return ERR_PTR(ret);
> >
>
> --
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 Nürnberg, Germany
> (HRB 36809, AG Nürnberg)
> Geschäftsführer: Felix Imendörffer
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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