3.16.7-ckt18 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Kevin Cernekee <[email protected]> commit 98fb1ffd8154890d7051750e61ff5548c3ee2ab2 upstream. 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 <[email protected]> Signed-off-by: Ezequiel Garcia <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> [ luis: backported to 3.16: used Kevin's backport to 3.14 ] Signed-off-by: Luis Henriques <[email protected]> --- drivers/mtd/ubi/block.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c index 8457df7ec5af..8b4a182d7cf9 100644 --- a/drivers/mtd/ubi/block.c +++ b/drivers/mtd/ubi/block.c @@ -255,6 +255,7 @@ static int do_ubiblock_request(struct ubiblock *dev, struct request *req) mutex_lock(&dev->dev_mutex); ret = ubiblock_read(dev, bio_data(req->bio), sec, len); mutex_unlock(&dev->dev_mutex); + rq_flush_dcache_pages(req); return ret; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
