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authorMaarten Maathuis <madman2003@gmail.com>2010-02-20 03:22:21 +0100
committerDave Airlie <airlied@redhat.com>2010-02-25 13:33:04 +1000
commit290e55056ec3d25c72088628245d8cae037b30db (patch)
tree5496a6ab798602063e5d27d5d31caa102f44ded2 /drivers/gpu
parent6a8a2d702b33c6ed5c789f21b4e89fdf221f01ca (diff)
drm/ttm: handle OOM in ttm_tt_swapout
- Without this change I get a general protection fault. - Also use PTR_ERR where applicable. Signed-off-by: Maarten Maathuis <madman2003@gmail.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Acked-by: Thomas Hellstrom <thellstrom@vmware.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/ttm/ttm_tt.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index e2123af7775..160c2745f8d 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -476,7 +476,7 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
void *from_virtual;
void *to_virtual;
int i;
- int ret;
+ int ret = -ENOMEM;
if (ttm->page_flags & TTM_PAGE_FLAG_USER) {
ret = ttm_tt_set_user(ttm, ttm->tsk, ttm->start,
@@ -495,8 +495,10 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
for (i = 0; i < ttm->num_pages; ++i) {
from_page = read_mapping_page(swap_space, i, NULL);
- if (IS_ERR(from_page))
+ if (IS_ERR(from_page)) {
+ ret = PTR_ERR(from_page);
goto out_err;
+ }
to_page = __ttm_tt_get_page(ttm, i);
if (unlikely(to_page == NULL))
goto out_err;
@@ -519,7 +521,7 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
return 0;
out_err:
ttm_tt_free_alloced_pages(ttm);
- return -ENOMEM;
+ return ret;
}
int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
@@ -531,6 +533,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
void *from_virtual;
void *to_virtual;
int i;
+ int ret = -ENOMEM;
BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
BUG_ON(ttm->caching_state != tt_cached);
@@ -553,7 +556,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
0);
if (unlikely(IS_ERR(swap_storage))) {
printk(KERN_ERR "Failed allocating swap storage.\n");
- return -ENOMEM;
+ return PTR_ERR(swap_storage);
}
} else
swap_storage = persistant_swap_storage;
@@ -565,9 +568,10 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
if (unlikely(from_page == NULL))
continue;
to_page = read_mapping_page(swap_space, i, NULL);
- if (unlikely(to_page == NULL))
+ if (unlikely(IS_ERR(to_page))) {
+ ret = PTR_ERR(to_page);
goto out_err;
-
+ }
preempt_disable();
from_virtual = kmap_atomic(from_page, KM_USER0);
to_virtual = kmap_atomic(to_page, KM_USER1);
@@ -591,5 +595,5 @@ out_err:
if (!persistant_swap_storage)
fput(swap_storage);
- return -ENOMEM;
+ return ret;
}