drm/radeon/kms: fix for the extra pages copying.

Thanks to Michel for pointing this out to me, this is
why I need to get more sleep, over complicate this a bit.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index dea8acf88865..5ab2cf96a264 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -303,13 +303,11 @@ int radeon_cs_finish_pages(struct radeon_cs_parser *p)
 int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx)
 {
         int new_page;
-        int num_extra_pages;
         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
         int i;
         int size = PAGE_SIZE;
 
-        num_extra_pages = (pg_idx - ibc->last_copied_page - 1);
-        for (i = ibc->last_copied_page + 1; i < ibc->last_copied_page + num_extra_pages; i++) {
+        for (i = ibc->last_copied_page + 1; i < pg_idx; i++) {
                 if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
                                        ibc->user_ptr + (i * PAGE_SIZE),
                                        PAGE_SIZE)) {