[U-Boot] [PATCH] fs: ext4: fix symlink read function

[Gary Bisson]

Since last API changes for files >2GB, the read of symlink is broken as
ext4fs_read_file now returns 0 instead of the length of the actual read.

Signed-off-by: Gary Bisson <gary.bisson at boundarydevices.com>
---
Hi all,

Switching from an old v2014.07 to v2015.07 we've noticed that we couldn't
read symlinks any more. This is due to the API changes made to
ext4fs_read_file (commit 9f12cd0).

This patch makes the read symlink check both for errors (status < 0) and
actual read length.

Regards,
Gary
---
 fs/ext4/ext4_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index cab5465..e2ab145 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -2040,7 +2040,7 @@ static char *ext4fs_read_symlink(struct ext2fs_node *node)
 		status = ext4fs_read_file(diro, 0,
 					   __le32_to_cpu(diro->inode.size),
 					   symlink, &actread);
-		if (status == 0) {
+		if ((status < 0) || (actread == 0)) {
 			free(symlink);
 			return 0;
 		}
-- 
2.5.1