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| author | Dave Airlie <airlied@redhat.com> | 2014-09-19 02:41:12 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2014-09-19 02:41:12 +0200 |
| commit | 6b654af5e694754672894c134eb50cfa2b79dc2e (patch) | |
| tree | ac2c05bcab401670711ad824613294b5cf361162 | |
| parent | Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/fbdev into drm-next (diff) | |
| parent | drm/radeon: fix AGP userptr handling (diff) | |
| download | linux-6b654af5e694754672894c134eb50cfa2b79dc2e.tar.xz linux-6b654af5e694754672894c134eb50cfa2b79dc2e.zip | |
Merge branch 'drm-next-3.18' of git://people.freedesktop.org/~agd5f/linux into drm-next
single AGP fix
* 'drm-next-3.18' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: fix AGP userptr handling
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_ttm.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index eca2ce60d440..d73ea9c04227 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -675,10 +675,17 @@ static struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev, return >t->ttm.ttm; } +static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct ttm_tt *ttm) +{ + if (!ttm || ttm->func != &radeon_backend_func) + return NULL; + return (struct radeon_ttm_tt *)ttm; +} + static int radeon_ttm_tt_populate(struct ttm_tt *ttm) { + struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm); struct radeon_device *rdev; - struct radeon_ttm_tt *gtt = (void *)ttm; unsigned i; int r; bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG); @@ -686,7 +693,7 @@ static int radeon_ttm_tt_populate(struct ttm_tt *ttm) if (ttm->state != tt_unpopulated) return 0; - if (gtt->userptr) { + if (gtt && gtt->userptr) { ttm->sg = kcalloc(1, sizeof(struct sg_table), GFP_KERNEL); if (!ttm->sg) return -ENOMEM; @@ -741,11 +748,11 @@ static int radeon_ttm_tt_populate(struct ttm_tt *ttm) static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm) { struct radeon_device *rdev; - struct radeon_ttm_tt *gtt = (void *)ttm; + struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm); unsigned i; bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG); - if (gtt->userptr) { + if (gtt && gtt->userptr) { kfree(ttm->sg); ttm->page_flags &= ~TTM_PAGE_FLAG_SG; return; @@ -782,7 +789,7 @@ static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm) int radeon_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr, uint32_t flags) { - struct radeon_ttm_tt *gtt = (void *)ttm; + struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm); if (gtt == NULL) return -EINVAL; @@ -795,7 +802,7 @@ int radeon_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr, bool radeon_ttm_tt_has_userptr(struct ttm_tt *ttm) { - struct radeon_ttm_tt *gtt = (void *)ttm; + struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm); if (gtt == NULL) return false; @@ -805,7 +812,7 @@ bool radeon_ttm_tt_has_userptr(struct ttm_tt *ttm) bool radeon_ttm_tt_is_readonly(struct ttm_tt *ttm) { - struct radeon_ttm_tt *gtt = (void *)ttm; + struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm); if (gtt == NULL) return false; |