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staging: erofs: fix a missing endian conversion

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This patch fixes a missing endian conversion in
vle_get_logical_extent_head.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gao Xiang 2018-09-18 22:25:33 +08:00 committed by Greg Kroah-Hartman
parent f4cd8d753a
commit 37ec35a6cc
1 changed files with 5 additions and 3 deletions
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8
drivers/staging/erofs/unzip_vle.c
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@ -1488,6 +1488,7 @@ static erofs_off_t vle_get_logical_extent_head(
struct super_block *const sb = inode->i_sb;
const unsigned int clusterbits = EROFS_SB(sb)->clusterbits;
const unsigned int clustersize = 1 << clusterbits;
unsigned int delta0;
if (page->index != blkaddr) {
kunmap_atomic(*kaddr_iter);
@ -1502,12 +1503,13 @@ static erofs_off_t vle_get_logical_extent_head(
di = *kaddr_iter + vle_extent_blkoff(inode, lcn);
switch (vle_cluster_type(di)) {
case Z_EROFS_VLE_CLUSTER_TYPE_NONHEAD:
BUG_ON(!di->di_u.delta[0]);
BUG_ON(lcn < di->di_u.delta[0]);
delta0 = le16_to_cpu(di->di_u.delta[0]);
DBG_BUGON(!delta0);
DBG_BUGON(lcn < delta0);
ofs = vle_get_logical_extent_head(inode,
page_iter, kaddr_iter,
lcn - di->di_u.delta[0], pcn, flags);
lcn - delta0, pcn, flags);
break;
case Z_EROFS_VLE_CLUSTER_TYPE_PLAIN:
*flags ^= EROFS_MAP_ZIPPED;