tree 7b64321201ddde6d9cd049851039156d3221a39b
parent 58c81957b7d284c57a9fc1b815c77155ef744ea5
author Ard Biesheuvel <ard.biesheuvel@linaro.org> 1417351863 +0100
committer Brian Norris <computersforpeace@gmail.com> 1418440336 -0800

mtd: physmap_of: fix potential NULL dereference

On device remove, when testing the cmtd field of an of_flash
struct to decide whether it is a concatenated device or not,
we get a false positive on cmtd == NULL, and dereference it
subsequently. This may occur if of_flash_remove() is called
from the cleanup path of of_flash_probe().

Instead, test for NULL first, and only then perform the test
for a concatenated device.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>