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authorWei Yongjun <weiyongjun1@huawei.com>2019-09-18 08:30:33 +0000
committerGao Xiang <gaoxiang25@huawei.com>2019-10-01 04:53:50 +0800
commit517d6b9c6f71bee15c729155445c42cc4ef77dda (patch)
treeef7fb5c474862c61dc5f0116e3f85f20b4bd4a28 /fs/erofs
parent54ecb8f7028c5eb3d740bb82b0f1d90f2df63c5c (diff)
downloadlinux-517d6b9c6f71bee15c729155445c42cc4ef77dda.tar.bz2
erofs: fix return value check in erofs_read_superblock()
In case of error, the function read_mapping_page() returns ERR_PTR() not NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: fe7c2423570d ("erofs: use read_mapping_page instead of sb_bread") Reviewed-by: Gao Xiang <gaoxiang25@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Link: https://lore.kernel.org/r/20190918083033.47780-1-weiyongjun1@huawei.com Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Diffstat (limited to 'fs/erofs')
-rw-r--r--fs/erofs/super.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index caf9a95173b0..0e369494f2f2 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -105,9 +105,9 @@ static int erofs_read_superblock(struct super_block *sb)
int ret;
page = read_mapping_page(sb->s_bdev->bd_inode->i_mapping, 0, NULL);
- if (!page) {
+ if (IS_ERR(page)) {
erofs_err(sb, "cannot read erofs superblock");
- return -EIO;
+ return PTR_ERR(page);
}
sbi = EROFS_SB(sb);