diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index e5d2bdf2cc9b..e0389ad1477d 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -446,13 +446,16 @@ fast_shmem_write(struct page **pages, int length) { char __iomem *vaddr; + unsigned long unwritten; vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0); if (vaddr == NULL) return -ENOMEM; - __copy_from_user_inatomic(vaddr + page_offset, data, length); + unwritten = __copy_from_user_inatomic(vaddr + page_offset, data, length); kunmap_atomic(vaddr, KM_USER0); + if (unwritten) + return -EFAULT; return 0; } |