aboutsummaryrefslogtreecommitdiffstats
path: root/net
diff options
context:
space:
mode:
Diffstat (limited to 'net')
-rw-r--r--net/rds/page.c27
1 files changed, 7 insertions, 20 deletions
diff --git a/net/rds/page.c b/net/rds/page.c
index 595a952d4b17..1dfbfea12e9b 100644
--- a/net/rds/page.c
+++ b/net/rds/page.c
@@ -57,30 +57,17 @@ int rds_page_copy_user(struct page *page, unsigned long offset,
57 unsigned long ret; 57 unsigned long ret;
58 void *addr; 58 void *addr;
59 59
60 if (to_user) 60 addr = kmap(page);
61 if (to_user) {
61 rds_stats_add(s_copy_to_user, bytes); 62 rds_stats_add(s_copy_to_user, bytes);
62 else 63 ret = copy_to_user(ptr, addr + offset, bytes);
64 } else {
63 rds_stats_add(s_copy_from_user, bytes); 65 rds_stats_add(s_copy_from_user, bytes);
64 66 ret = copy_from_user(addr + offset, ptr, bytes);
65 addr = kmap_atomic(page, KM_USER0);
66 if (to_user)
67 ret = __copy_to_user_inatomic(ptr, addr + offset, bytes);
68 else
69 ret = __copy_from_user_inatomic(addr + offset, ptr, bytes);
70 kunmap_atomic(addr, KM_USER0);
71
72 if (ret) {
73 addr = kmap(page);
74 if (to_user)
75 ret = copy_to_user(ptr, addr + offset, bytes);
76 else
77 ret = copy_from_user(addr + offset, ptr, bytes);
78 kunmap(page);
79 if (ret)
80 return -EFAULT;
81 } 67 }
68 kunmap(page);
82 69
83 return 0; 70 return ret ? -EFAULT : 0;
84} 71}
85EXPORT_SYMBOL_GPL(rds_page_copy_user); 72EXPORT_SYMBOL_GPL(rds_page_copy_user);
86 73