tree f6e9baa451e99ed768ded0847d9005605ea2a4c9
parent 5ebe6afaf0057ac3eaeb98defd5456894b446d22
author Kevin Cernekee <cernekee@chromium.org> 1429705853 -0300
committer Richard Weinberger <richard@nod.at> 1430945542 +0200

UBI: block: Add missing cache flushes

Block drivers are responsible for calling flush_dcache_page() on each
BIO request. This operation keeps the I$ coherent with the D$ on
architectures that don't have hardware coherency support. Without this
flush, random crashes are seen when executing user programs from an ext4
filesystem backed by a ubiblock device.

This patch is based on the change implemented in commit 2d4dc890b5c8
("block: add helpers to run flush_dcache_page() against a bio and a
request's pages").

Fixes: 9d54c8a33eec ("UBI: R/O block driver on top of UBI volumes")
Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: Richard Weinberger <richard@nod.at>