ACK: [SRU][G/aws][PATCH 0/1] fix broken /dev/console on i3.metal

[Colin Ian King]

On 24/09/2020 11:53, Andrea Righi wrote:
> BugLink: https://bugs.launchpad.net/bugs/1896604
> 
> [Impact]
> 
> Starting with kernel 5.8 the default nr_uarts has been changed from 4 to
> 2 for amd64, but this seems to affect i3.metal instances in AWS, because
> ttyS0 is now remapped to ttyS4 and this is breaking tools like
> cloud-init (and probably something else).
> 
> [Test case]
> 
> # echo > /dev/console
> bash: echo: write error: Input/output error
> 
> [Fix]
> 
> Setting nr_uarts=4 by default (via CONFIG_SERIAL_8250_RUNTIME_UARTS)
> restores the previous behavior and writing to /dev/console works without
> returning any error.
> 
> [Regression potential]
> 
> Minimal. Restores the old behavior used in 5.4 (that shouldn't have
> changed in the first place).
> 
> 
Makes perfect sense, hard to see any real regression potential here.
Thanks Andrea.

Acked-by: Colin Ian King <colin.king at canonical.com>