[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[PULL 07/13] hw/arm/mcimx7d-sabre: Replace drive_get_next() by drive_get

From: Markus Armbruster
Subject: [PULL 07/13] hw/arm/mcimx7d-sabre: Replace drive_get_next() by drive_get()
Date: Wed, 15 Dec 2021 15:02:16 +0100

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 "mcimx7d-sabre" 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: Peter Maydell <peter.maydell@linaro.org>
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: qemu-arm@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20211117163409.3587705-8-armbru@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
 hw/arm/mcimx7d-sabre.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/arm/mcimx7d-sabre.c b/hw/arm/mcimx7d-sabre.c
index 935d4b0f1c..50a5ecde31 100644
--- a/hw/arm/mcimx7d-sabre.c
+++ b/hw/arm/mcimx7d-sabre.c
@@ -52,7 +52,7 @@ static void mcimx7d_sabre_init(MachineState *machine)
         DriveInfo *di;
         BlockBackend *blk;
-        di = drive_get_next(IF_SD);
+        di = drive_get(IF_SD, 0, i);
         blk = di ? blk_by_legacy_dinfo(di) : NULL;
         bus = qdev_get_child_bus(DEVICE(&s->usdhc[i]), "sd-bus");
         carddev = qdev_new(TYPE_SD_CARD);

reply via email to

[Prev in Thread] Current Thread [Next in Thread]