commit a05af290bac55be65e979e007687d4e27cfa7b8d
author Andy Pei <andy.pei@intel.com> Tue Dec 07 09:31:08 2021 +0800
committer Kevin O'Connor <kevin@koconnor.net> Sat Dec 18 11:52:43 2021 -0500
tree 35275df7582a11bf214d7094d7bdad05ec15bb03
parent 815d7498655b8207821d405bc49fa993702f456f

virtio-blk: split large IO according to size_max

if driver reads data larger than VIRTIO_BLK_F_SIZE_MAX,
it will cause some issue to the DMA engine.

So when upper software wants to read data larger than
VIRTIO_BLK_F_SIZE_MAX, virtio-blk driver split one large
request into multiple smaller ones.

Signed-off-by: Andy Pei <andy.pei@intel.com>
Signed-off-by: Ding Limin <dinglimin@cmss.chinamobile.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>