CHROMIUM: dm-verity: Remove REQ_PREFLUSH during REQ_OP_READ

Commit b4a6bb3a67aa ("block: add a sanity check for non-write flush/fua
bios") allows REQ_PREFLUSH to be set for write bios only. Remove
REQ_PREFLUSH during REQ_OP_READ.

BUG=b:333888061
TEST=tast.firmware.VerityCorruptRootfs.dev pass on Brya.
UPSTREAM-TASK=b:149112468

Change-Id: I239576d597d2e649d0bebd1268ad4d31617788e8
Signed-off-by: Lalith Rajendran <lalithkraj@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5464495
Reviewed-by: Daniil Lunev <dlunev@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5466329
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Commit-Queue: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Sarthak Kukreti <sarthakkukreti@google.com>
1 file changed