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, 2 insertions, 2 deletions

diff --git a/include/hw/arm/omap.h b/include/hw/arm/omap.h
index b9655ee397..0ad5fb883c 100644
--- a/include/hw/arm/omap.h
+++ b/include/hw/arm/omap.h
@@ -755,10 +755,10 @@ void omap_rfbi_attach(struct omap_dss_s *s, int cs, struct rfbi_chip_s *chip);
 struct omap_mmc_s;
 struct omap_mmc_s *omap_mmc_init(hwaddr base,
                 MemoryRegion *sysmem,
-                BlockDriverState *bd,
+                BlockBackend *blk,
                 qemu_irq irq, qemu_irq dma[], omap_clk clk);
 struct omap_mmc_s *omap2_mmc_init(struct omap_target_agent_s *ta,
-                BlockDriverState *bd, qemu_irq irq, qemu_irq dma[],
+                BlockBackend *blk, qemu_irq irq, qemu_irq dma[],
                 omap_clk fclk, omap_clk iclk);
 void omap_mmc_reset(struct omap_mmc_s *s);
 void omap_mmc_handlers(struct omap_mmc_s *s, qemu_irq ro, qemu_irq cover);