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Sender: Guenter Roeck <groeck7@gmail.com>
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Date:   Wed, 10 Aug 2022 05:58:58 -0700
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To:     Saravana Kannan <saravanak@google.com>
Cc:     Russell King <linux@armlinux.org.uk>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Rob Herring <robh@kernel.org>,
        Ulf Hansson <ulf.hansson@linaro.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Sudeep Holla <sudeep.holla@arm.com>,
        Nicolas Saenz Julienne <nsaenz@kernel.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Kefeng Wang <wangkefeng.wang@huawei.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        patches@armlinux.org.uk, kernel-team@android.com,
        linux-kernel@vger.kernel.org
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From:   Guenter Roeck <linux@roeck-us.net>
Subject: Re: [PATCH v6] amba: Remove deferred device addition
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On 8/9/22 20:33, Saravana Kannan wrote:
[ ... ]

> 
> Can you give me more details on the qemu configuration so I could try
> to reproduce it?

qemu-system-arm -M vexpress-a9 -kernel arch/arm/boot/zImage -no-reboot \
     -initrd rootfs-armv5.cpio -m 128 \
     --append "rdinit=/sbin/init console=ttyAMA0,115200" \
     -dtb arch/arm/boot/dts/vexpress-v2p-ca9.dtb \
     -nographic -monitor null -serial stdio

using multi_v7_defconfig will hang nicely with your patch applied,
and boot as expected without. This was with qemu v7.0, but I am
sure older qemu versions will show the same behavior. The initrd
used should not matter, but you'll find it at
https://github.com/groeck/linux-build-test/blob/master/rootfs/arm-v7/rootfs-armv5.cpio.gz

Guenter