hw: Convert from BlockDriverState to BlockBackend, mostly

Device models should access their block backends only through the
block-backend.h API.  Convert them, and drop direct includes of
inappropriate headers.

Just four uses of BlockDriverState are left:

* The Xen paravirtual block device backend (xen_disk.c) opens images
  itself when set up via xenbus, bypassing blockdev.c.  I figure it
  should go through qmp_blockdev_add() instead.

* Device model "usb-storage" prompts for keys.  No other device model
  does, and this one probably shouldn't do it, either.

* ide_issue_trim_cb() uses bdrv_aio_discard() instead of
  blk_aio_discard() because it fishes its backend out of a BlockAIOCB,
  which has only the BlockDriverState.

* PC87312State has an unused BlockDriverState[] member.

The next two commits take care of the latter two.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/hw/display/tc6393xb.c b/hw/display/tc6393xb.c
index 576f319d12..4306adc959 100644
--- a/hw/display/tc6393xb.c
+++ b/hw/display/tc6393xb.c
@@ -577,7 +577,7 @@ TC6393xbState *tc6393xb_init(MemoryRegion *sysmem, uint32_t base, qemu_irq irq)
     s->sub_irqs = qemu_allocate_irqs(tc6393xb_sub_irq, s, TC6393XB_NR_IRQS);
 
     nand = drive_get(IF_MTD, 0, 0);
-    s->flash = nand_init(nand ? blk_bs(blk_by_legacy_dinfo(nand)) : NULL,
+    s->flash = nand_init(nand ? blk_by_legacy_dinfo(nand) : NULL,
                          NAND_MFR_TOSHIBA, 0x76);
 
     memory_region_init_io(&s->iomem, NULL, &tc6393xb_ops, s, "tc6393xb", 0x10000);