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hw/arm/xlnx-zcu102: Replace drive_get_next() by drive_get()

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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-zcu102" connects backends with drive_get_next() in
several counting loops.  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: <20211117163409.3587705-11-armbru@redhat.com>
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
This commit is contained in:
Markus Armbruster 2021-11-17 17:34:06 +01:00
parent 0de89a8632
commit 97ca6c2786
1 changed files with 3 additions and 3 deletions
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6
hw/arm/xlnx-zcu102.c
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@ -169,7 +169,7 @@ static void xlnx_zcu102_init(MachineState *machine)
/* Create and plug in the SD cards */
for (i = 0; i < XLNX_ZYNQMP_NUM_SDHCI; i++) {
BusState *bus;
DriveInfo *di = drive_get_next(IF_SD);
DriveInfo *di = drive_get(IF_SD, 0, i);
BlockBackend *blk = di ? blk_by_legacy_dinfo(di) : NULL;
DeviceState *carddev;
char *bus_name;
@ -190,7 +190,7 @@ static void xlnx_zcu102_init(MachineState *machine)
BusState *spi_bus;
DeviceState *flash_dev;
qemu_irq cs_line;
DriveInfo *dinfo = drive_get_next(IF_MTD);
DriveInfo *dinfo = drive_get(IF_MTD, 0, i);
gchar *bus_name = g_strdup_printf("spi%d", i);
spi_bus = qdev_get_child_bus(DEVICE(&s->soc), bus_name);
@ -212,7 +212,7 @@ static void xlnx_zcu102_init(MachineState *machine)
BusState *spi_bus;
DeviceState *flash_dev;
qemu_irq cs_line;
DriveInfo *dinfo = drive_get_next(IF_MTD);
DriveInfo *dinfo = drive_get(IF_MTD, 0, XLNX_ZYNQMP_NUM_SPIS + i);
int bus = i / XLNX_ZYNQMP_NUM_QSPI_BUS_CS;
gchar *bus_name = g_strdup_printf("qspi%d", bus);