[PATCH] arch: mips: sibyte: Return -EFAULT if copy_to_user() fails

[Wang Qing]

The copy_to_user() function returns the number of bytes remaining to be
copied, but we want to return -EFAULT if the copy doesn't complete.

Signed-off-by: Wang Qing <wangq...@vivo.com>
---
 arch/mips/sibyte/common/sb_tbprof.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/sibyte/common/sb_tbprof.c 
b/arch/mips/sibyte/common/sb_tbprof.c
index f80d7a7..eac125f
--- a/arch/mips/sibyte/common/sb_tbprof.c
+++ b/arch/mips/sibyte/common/sb_tbprof.c
@@ -465,7 +465,7 @@ static ssize_t sbprof_tb_read(struct file *filp, char *buf,
                if (err) {
                        *offp = cur_off + cur_count - err;
                        mutex_unlock(&sbp.lock);
-                       return err;
+                       return -EFAULT;
                }
                pr_debug(DEVNAME ": read from sample %d, %d bytes\n",
                         cur_sample, cur_count);
-- 
2.7.4