--- fs/sysfs/file.c

+++ fs/sysfs/file.c

@@ -340,7 +340,7 @@ static int sysfs_open_file(struct inode

char *p;

p = d_path(&file->f_path, last_sysfs_file, sizeof(last_sysfs_file));

- if (p)

+ if (!IS_ERR(p))

memmove(last_sysfs_file, p, strlen(p) + 1);

/* need attr_sd for attr and ops, its parent for kobj */