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make nfs_follow_remote_path() handle ERR_PTR() passed as root_mnt

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... rather than duplicating that in callers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-11-16 21:52:06 -05:00
parent 5ffc2836a2
commit 5352d3b65a
1 changed files with 9 additions and 9 deletions
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18
fs/nfs/super.c
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@ -2787,11 +2787,15 @@ static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
const char *export_path)
{
struct dentry *dentry;
int ret = nfs_referral_loop_protect();
int err;
if (ret) {
if (IS_ERR(root_mnt))
return ERR_CAST(root_mnt);
err = nfs_referral_loop_protect();
if (err) {
mntput(root_mnt);
return ERR_PTR(ret);
return ERR_PTR(err);
}
dentry = mount_subtree(root_mnt, export_path);
@ -2815,9 +2819,7 @@ static struct dentry *nfs4_try_mount(int flags, const char *dev_name,
data->nfs_server.hostname);
data->nfs_server.export_path = export_path;
res = ERR_CAST(root_mnt);
if (!IS_ERR(root_mnt))
res = nfs_follow_remote_path(root_mnt, export_path);
res = nfs_follow_remote_path(root_mnt, export_path);
dfprintk(MOUNT, "<-- nfs4_try_mount() = %ld%s\n",
IS_ERR(res) ? PTR_ERR(res) : 0,
@ -3078,9 +3080,7 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
flags, data, data->hostname);
data->mnt_path = export_path;
res = ERR_CAST(root_mnt);
if (!IS_ERR(root_mnt))
res = nfs_follow_remote_path(root_mnt, export_path);
res = nfs_follow_remote_path(root_mnt, export_path);
dprintk("<-- nfs4_referral_mount() = %ld%s\n",
IS_ERR(res) ? PTR_ERR(res) : 0,
IS_ERR(res) ? " [error]" : "");