On 03/28/2017 02:14 PM, Tyler Baicar wrote: > If a HED type error occurs prior to GHES probing, the kernel will > never report the error. The HED driver will see that no notifiers > are registers, and clear the interrupt. ..."registers" or "registered"? > This becomes a more serious problem with firmware that supports > GHESv2 acknowledgements from the kernel. The firmware will populate > the error and wait for the kernel ack. But since the kernel will > never process the error we get into a state that the firmware will > not send any more errors and the kernel will never see or ack the > original error. > > Check for pending errors when probing HED type GHES entries to > avoid the above situation. > > This patch is based on Shiju's patch that adds support for GSIV > and GPIO notification types: > https://patchwork.kernel.org/patch/9628817/ > > Signed-off-by: Tyler Baicar <tbaicar@xxxxxxxxxxxxxx> > --- > drivers/acpi/apei/ghes.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c > index fd39929..cf5e938 100644 > --- a/drivers/acpi/apei/ghes.c > +++ b/drivers/acpi/apei/ghes.c > @@ -1035,6 +1035,7 @@ static int ghes_probe(struct platform_device *ghes_dev) > register_acpi_hed_notifier(&ghes_notifier_hed); > list_add_rcu(&ghes->list, &ghes_hed); > mutex_unlock(&ghes_list_mutex); > + ghes_proc(ghes); > break; > case ACPI_HEST_NOTIFY_NMI: > ghes_nmi_add(ghes); > -- ciao, al ----------------------------------- Al Stone Software Engineer Red Hat, Inc. ahs3@xxxxxxxxxx ----------------------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
