[PATCH] erofs: reduntant assignment in __erofs_get_meta_page()

From: Gao Xiang
Date: Thu Aug 29 2019 - 13:18:48 EST


As Joe Perches suggested [1],
err = bio_add_page(bio, page, PAGE_SIZE, 0);
- if (unlikely(err != PAGE_SIZE)) {
+ if (err != PAGE_SIZE) {
err = -EFAULT;
goto err_out;
}

The initial assignment to err is odd as it's not
actually an error value -E<FOO> but a int size
from a unsigned int len.

Here the return is either 0 or PAGE_SIZE.

This would be more legible to me as:

if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE) {
err = -EFAULT;
goto err_out;
}

[1] https://lore.kernel.org/r/74c4784319b40deabfbaea92468f7e3ef44f1c96.camel@xxxxxxxxxxx/
Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx>
---
fs/erofs/data.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 0f2f1a839372..0983807737fd 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -69,8 +69,7 @@ struct page *__erofs_get_meta_page(struct super_block *sb,
goto err_out;
}

- err = bio_add_page(bio, page, PAGE_SIZE, 0);
- if (err != PAGE_SIZE) {
+ if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE) {
err = -EFAULT;
goto err_out;
}
--
2.17.1