On Wed, Dec 18, 2019 at 04:01:11AM +0000, Dmitry Safonov wrote:

In contrast to 8250/8250_of, legacy_serial on powerpc does fill
(struct plat_serial8250_port). The reason is likely that it's done on
device_initcall(), not on probe. So, 8250_core is not yet probed.

Propagate value from platform_device on 8250 probe - in case powepc
legacy driver it's initialized on initcall, in case 8250_of it will be
initialized later on of_platform_serial_setup().

Fixes: ea2683bf546c ("tty/serial: Migrate 8250_fsl to use has_sysrq").
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <redacted>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Reported-by: kbuild test robot <redacted>
Signed-off-by: Dmitry Safonov <redacted>
---
 It's probably better to squash this into the 8250_fsl patch.
 I've added Fixes tag in case the branch won't be rebased.
 Tested powerpc build manually with ppc64 cross-compiler.

I have squashed this into that original 8250_fsl patch now, and rebased
the series.  Let's see what kbuild does...

thanks,

greg k-h