[PATCH 4.4 116/190] bio-integrity: Do not allocate integrity context for bio w/o data

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Dmitry Monakhov [ Upstream commit 3116a23bb30272d74ea81baf5d0ee23f602dd15b ] If bio has no data, such as ones from blkdev_issue_flush(), then we have nothing to protect.

[PATCH 4.4 116/190] bio-integrity: Do not allocate integrity context for bio w/o data

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Dmitry Monakhov [ Upstream commit 3116a23bb30272d74ea81baf5d0ee23f602dd15b ] If bio has no data, such as ones from blkdev_issue_flush(), then we have nothing to protect. This patch prevent