mtd: mtdchar: return expected errors on mmap() call
According both to POSIX.1-2008 and Linux Programmer's Manual mmap()
syscall shouldn't return undocumented ENOSYS, this change replaces
the errno with more appropriate ENODEV and EACCESS.
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Cc: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 9aa0c5e..2147e73 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1100,7 +1100,7 @@
return (unsigned long) -EINVAL;
ret = mtd_get_unmapped_area(mtd, len, offset, flags);
- return ret == -EOPNOTSUPP ? -ENOSYS : ret;
+ return ret == -EOPNOTSUPP ? -ENODEV : ret;
}
#endif
@@ -1125,9 +1125,9 @@
#endif
return vm_iomap_memory(vma, map->phys, map->size);
}
- return -ENOSYS;
+ return -ENODEV;
#else
- return vma->vm_flags & VM_SHARED ? 0 : -ENOSYS;
+ return vma->vm_flags & VM_SHARED ? 0 : -EACCES;
#endif
}