[U-Boot] [RFC PATCH] ext4: Fix comparision of unsigned expression with < 0

[Lokesh Vutla]

In file ext4fs.c funtion ext4fs_read_file() compares an
unsigned expression with < 0 like below

	lbaint_t blknr;
	blknr = read_allocated_block(&(node->inode), i);
	if (blknr < 0)
		return -1;

blknr is of type ulong/uint64_t. read_allocated_block() returns
long int. So comparing blknr with < 0 will always be false. Instead
declare blknr as long int.

Reported-by: Sunita Nadampalli <sunitan at ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>
---
 fs/ext4/ext4fs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index 7187dcfb05..081509dbb4 100644
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -71,7 +71,7 @@ int ext4fs_read_file(struct ext2fs_node *node, loff_t pos,
 	blockcnt = lldiv(((len + pos) + blocksize - 1), blocksize);
 
 	for (i = lldiv(pos, blocksize); i < blockcnt; i++) {
-		lbaint_t blknr;
+		long int blknr;
 		int blockoff = pos - (blocksize * i);
 		int blockend = blocksize;
 		int skipfirst = 0;
-- 
2.11.0