Emulate custom machine on qemu-4.2.0

[abhijeet inamdar]

Hi,

I was trying to emulate a machine in qemu-4.2.0 but was getting an error message: 

Unexpected error in qemu_chr_fe_init() at /home/qemu-4.2.0/chardev/char-fe.c:220:

qemu-system-arm: Device 'serial0' is in use

I tried to apply this patch 

https://patchwork.kernel.org/project/qemu-devel/patch/20200306171458.1848-25-kwolf@redhat.com/ 

But still the error persists. Any suggestions?

Thank you,

Abhijeet.