* [PATCH] acpi: don't register acpi_pad driver if running as xen dom0
@ 2016-10-12 11:11 Juergen Gross
2016-10-13 22:00 ` Rafael J. Wysocki
0 siblings, 1 reply; 2+ messages in thread
From: Juergen Gross @ 2016-10-12 11:11 UTC (permalink / raw)
To: linux-kernel, xen-devel, linux-acpi; +Cc: lenb, rjw, Juergen Gross
When running as Xen dom0 a special processor_aggregator driver is
needed. Don't register the standard driver in this case.
Without that check an error message:
"Error: Driver 'processor_aggregator' is already registered,
aborting..."
will be displayed.
Signed-off-by: Juergen Gross <jgross@suse.com>
---
drivers/acpi/acpi_pad.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 8ea8211..1c3be12 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/acpi.h>
#include <asm/mwait.h>
+#include <xen/xen.h>
#define ACPI_PROCESSOR_AGGREGATOR_CLASS "acpi_pad"
#define ACPI_PROCESSOR_AGGREGATOR_DEVICE_NAME "Processor Aggregator"
@@ -477,6 +478,10 @@ static struct acpi_driver acpi_pad_driver = {
static int __init acpi_pad_init(void)
{
+ /* Xen acpi pad is responsible when running as Xen Dom0. */
+ if (xen_initial_domain())
+ return -ENODEV;
+
power_saving_mwait_init();
if (power_saving_mwait_eax == 0)
return -EINVAL;
--
2.6.6
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] acpi: don't register acpi_pad driver if running as xen dom0
2016-10-12 11:11 [PATCH] acpi: don't register acpi_pad driver if running as xen dom0 Juergen Gross
@ 2016-10-13 22:00 ` Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2016-10-13 22:00 UTC (permalink / raw)
To: Juergen Gross; +Cc: linux-kernel, xen-devel, linux-acpi, lenb
On Wednesday, October 12, 2016 01:11:45 PM Juergen Gross wrote:
> When running as Xen dom0 a special processor_aggregator driver is
> needed. Don't register the standard driver in this case.
>
> Without that check an error message:
>
> "Error: Driver 'processor_aggregator' is already registered,
> aborting..."
>
> will be displayed.
>
> Signed-off-by: Juergen Gross <jgross@suse.com>
> ---
> drivers/acpi/acpi_pad.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
> index 8ea8211..1c3be12 100644
> --- a/drivers/acpi/acpi_pad.c
> +++ b/drivers/acpi/acpi_pad.c
> @@ -26,6 +26,7 @@
> #include <linux/slab.h>
> #include <linux/acpi.h>
> #include <asm/mwait.h>
> +#include <xen/xen.h>
>
> #define ACPI_PROCESSOR_AGGREGATOR_CLASS "acpi_pad"
> #define ACPI_PROCESSOR_AGGREGATOR_DEVICE_NAME "Processor Aggregator"
> @@ -477,6 +478,10 @@ static struct acpi_driver acpi_pad_driver = {
>
> static int __init acpi_pad_init(void)
> {
> + /* Xen acpi pad is responsible when running as Xen Dom0. */
> + if (xen_initial_domain())
> + return -ENODEV;
> +
> power_saving_mwait_init();
> if (power_saving_mwait_eax == 0)
> return -EINVAL;
>
Applied.
Thanks,
Rafael
^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-10-13 22:00 ` Rafael J. Wysocki
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