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Re: [PATCH v4] vga: don't abort when adding a duplicate isa-vga device

From: Philippe Mathieu-Daudé
Subject: Re: [PATCH v4] vga: don't abort when adding a duplicate isa-vga device
Date: Wed, 18 Aug 2021 10:08:52 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0

On 8/17/21 9:26 PM, Jose R. Ziviani wrote:
> If users try to add an isa-vga device that was already registered,
> still in command line, qemu will crash:
> $ qemu-system-mips64el -M pica61 -device isa-vga
> RAMBlock "vga.vram" already registered, abort!
> Aborted (core dumped)
> That particular board registers the device automaticaly, so it's
> not obvious that a VGA device already exists. This patch changes
> this behavior by displaying a message and exiting without crashing.
> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/44
> Signed-off-by: Jose R. Ziviani <jziviani@suse.de>
> ---
> v3 to v4: Used object_resolve_path_type instead of qemu_ram_block_by_name
>           and copied the message from virgl, to give the same user exp.
> v2 to v3: Improved error message
> v1 to v2: Use error_setg instead of error_report
>  hw/display/vga-isa.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

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