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 <wangqing@xxxxxxxx>
---
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
