[Skiboot] [PATCH] FSP/CONSOLE: Disable notification on unresponsive consoles

Stewart Smith stewart at linux.vnet.ibm.com
Tue Oct 31 14:43:51 AEDT 2017

Vasant Hegde <hegdevasant at linux.vnet.ibm.com> writes:
> Commit fd6b71fc fixed the situation where ipmi console was open (hvc0) but got
> data on different console (hvc1).
> During FSP R/R OPAL closes all consoles. After R/R complete FSP requests to
> open hvc1 and sends data on this. If hvc1 registration failed or not opened in
> host kernel then it will not read data and results in RCU stalls.
> Note that this is workaround for older kernel where we don't have separate irq
> for each console. Latest kernel works fine without this patch.
> CC: stable
> CC: Sam Mendoza-Jonas <sam at mendozajonas.com>
> Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
> ---
>  hw/fsp/fsp-console.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)

Merged to master as of c9cc5ef5772ebfbfff978f1c25763d733e45752c
and 5.4.x as of d4172005b25f4247d07c2d81deeddd3a323d8b41

Hopefully the last in the reset/reload cases around console fun.

Stewart Smith
OPAL Architect, IBM.

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