redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

drm/i915: set dummy page for stolen objects 

This is needed since currently sg_for_each_page assumes that we have
a valid page in each sg item. It is only a real problem for
CONFIG_SPARSEMEM where the page is dereferenced, in other cases the
iterator works ok with an invalid page pointer.

We can remove this workaround when we have fixed sg_page_iter to work on
scatterlists without backing pages.

Signed-off-by: Imre Deak <imre.deak@intel.com>
hifive-unleashed-5.1
Imre Deak 2013-03-22 23:10:44 +02:00 committed by Daniel Vetter
parent f5ddf69736
commit 5bd4687e57
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/i915/i915_gem_stolen.c
View File

@ -222,8 +222,8 @@ i915_pages_create_for_stolen(struct drm_device *dev,
}
sg = st->sgl;
sg->offset = offset;
sg->length = size;
/* we set the dummy page here only to make for_each_sg_page work */
sg_set_page(sg, dev_priv->gtt.scratch_page, size, offset);
sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset;
sg_dma_len(sg) = size;