[PATCH] bcachefs: debug: Fix copy_to_user() error code in flush_buf()

[Dan Carpenter]

The copy_to_user() function returns the number of bytes remaining to
be copied but we want to return -EFAULT to the user.

Fixes: e0750d947352 ("bcachefs: Initial commit")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
 fs/bcachefs/debug.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/bcachefs/debug.c b/fs/bcachefs/debug.c
index 404148bd348a..e65c0ab0c9ad 100644
--- a/fs/bcachefs/debug.c
+++ b/fs/bcachefs/debug.c
@@ -319,10 +319,9 @@ static ssize_t flush_buf(struct dump_iter *i)
 {
        if (i->buf.pos) {
                size_t bytes = min_t(size_t, i->buf.pos, i->size);
-               int err = copy_to_user(i->ubuf, i->buf.buf, bytes);
 
-               if (err)
-                       return err;
+               if (copy_to_user(i->ubuf, i->buf.buf, bytes))
+                       return -EFAULT;
 
                i->ret   += bytes;
                i->ubuf  += bytes;
-- 
2.39.2