hw/arm/xlnx-versal-virt: Replace drive_get_next() by drive_get()

drive_get_next() is basically a bad idea.  It returns the "next" block
backend of a certain interface type.  "Next" means bus=0,unit=N, where
subsequent calls count N up from zero, per interface type.

This lets you define unit numbers implicitly by execution order.  If the
order changes, or new calls appear "in the middle", unit numbers change.
ABI break.  Hard to spot in review.

Machine "xlnx-versal-virt" connects backends with drive_get_next() in
a counting loop.  Change it to use drive_get() directly.  This makes
the unit numbers explicit in the code.

Cc: Alistair Francis <alistair@alistair23.me>
Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-arm@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20211117163409.3587705-9-armbru@redhat.com>
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index d2f55e29b64452e3e39cb4817e7edfd4e93139bc..0c5edc898e10872a5576bb60a1babcd1b52badba 100644 (file)
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -669,7 +669,8 @@ static void versal_virt_init(MachineState *machine)
 
     /* Plugin SD cards.  */
     for (i = 0; i < ARRAY_SIZE(s->soc.pmc.iou.sd); i++) {
-        sd_plugin_card(&s->soc.pmc.iou.sd[i], drive_get_next(IF_SD));
+        sd_plugin_card(&s->soc.pmc.iou.sd[i],
+                       drive_get(IF_SD, 0, i));
     }
 
     s->binfo.ram_size = machine->ram_size;