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Date: Fri, 04 Nov 2016 09:05:38 +0100 From: Andreas Schwab <schwab@...ux-m68k.org> To: Paul Burton <paul.burton@...tec.com> Cc: Larry Finger <Larry.Finger@...inger.net>, Michael Ellerman <mpe@...erman.id.au>, Sergey Senozhatsky <sergey.senozhatsky@...il.com>, Andrew Morton <akpm@...ux-foundation.org>, Borislav Petkov <bp@...e.de>, Petr Mladek <pmladek@...e.com>, Tejun Heo <tj@...nel.org>, <linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org> Subject: Re: [PATCH v3] console: use first console if stdout-path device doesn't appear On Nov 03 2016, Paul Burton <paul.burton@...tec.com> wrote: > If a device tree specified a preferred device for kernel console output > via the stdout-path or linux,stdout-path chosen node properties there's > no guarantee that it will have specified a device for which we have a > driver. It may also be the case that we do have a driver but it doesn't > call of_console_check() to register as a preferred console (eg. offb > driver as used on powermac systems). > > In these cases try to ensure that we provide some console output by > enabling the first usable registered console, which we keep track of > with the of_fallback_console variable. Affected systems will enable > their console later than they did prior to commit 05fd007e4629 > ("console: don't prefer first registered if DT specifies stdout-path") > but should otherwise produce the same output. > > Tested in QEMU with a PowerPC pseries_defconfig kernel. Unfortunately, that still doesn't work on PowerMac. Andreas. -- Andreas Schwab, schwab@...ux-m68k.org GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."
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