- Without this change I get a general protection fault.
- Also use PTR_ERR where applicable.
Signed-off-by: Maarten Maathuis <madman2...@gmail.com>
---
drivers/gpu/drm/ttm/ttm_tt.c | 18 +++++++++++-------
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 9c2b1cc..5b5c320 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -467,7 +467,7 @@ 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,
@@ -486,8 +486,10 @@ 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;
@@ -510,7 +512,7 @@ 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)
@@ -522,6 +524,7 @@ 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);
@@ -544,7 +547,7 @@ 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;
@@ -556,9 +559,10 @@ 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);
@@ -582,5 +586,5 @@ out_err:
if (!persistant_swap_storage)
fput(swap_storage);
- return -ENOMEM;
+ return ret;
}
--
1.7.0
------------------------------------------------------------------------------
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proactively, and fine-tune applications for parallel performance.
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http://p.sf.net/sfu/intel-sw-dev
--
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