hypfs_create_cpu_files(): add missing check for hypfs_mkdir() failure

[ Upstream commit 00cdfdcfa0806202aea56b02cedbf87ef1e75df8 ]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/s390/hypfs/hypfs_diag_fs.c b/arch/s390/hypfs/hypfs_diag_fs.c
index 00a6d370a2803253b64d2db28da85e0faa154441..280266a74f378d2740c9a961301ac8ebbafef3c0 100644 (file)
--- a/arch/s390/hypfs/hypfs_diag_fs.c
+++ b/arch/s390/hypfs/hypfs_diag_fs.c
@@ -208,6 +208,8 @@ static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info)
        snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_get_info_type(),
                                                            cpu_info));
        cpu_dir = hypfs_mkdir(cpus_dir, buffer);
+       if (IS_ERR(cpu_dir))
+               return PTR_ERR(cpu_dir);
        rc = hypfs_create_u64(cpu_dir, "mgmtime",
                              cpu_info__acc_time(diag204_get_info_type(), cpu_info) -
                              cpu_info__lp_time(diag204_get_info_type(), cpu_info));