Commit d3121e64 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Rafael J. Wysocki
Browse files

ACPI: sysfs: Allow bitmap list to be supplied to acpi_mask_gpe 



Currently we need to use as many acpi_mask_gpe options as we want to have
GPEs to be masked. Even with two it already becomes inconveniently large
the kernel command line.

Instead, allow acpi_mask_gpe to represent bitmap list.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent bdd56d7d

Documentation/admin-guide/kernel-parameters.txt

+1 −1
Original line number Diff line number Diff line
@@ -113,7 +113,7 @@ 
			the GPE dispatcher.

			This facility can be used to prevent such uncontrolled

			GPE floodings.

			Format: <byte>

			Format: <byte> or <bitmap-list>



	acpi_no_auto_serialize	[HW,ACPI]

			Disable auto-serialization of AML methods

drivers/acpi/sysfs.c

+10 −3
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 


#define pr_fmt(fmt) "ACPI: " fmt



#include <linux/bitmap.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/moduleparam.h>
@@ -790,6 +791,7 @@ static ssize_t counter_set(struct kobject *kobj, 
 * the GPE flooding for GPE 00, they need to specify the following boot

 * parameter:

 *   acpi_mask_gpe=0x00

 * Note, the parameter can be a list (see bitmap_parselist() for the details).

 * The masking status can be modified by the following runtime controlling

 * interface:

 *   echo unmask > /sys/firmware/acpi/interrupts/gpe00
@@ -799,10 +801,15 @@ static DECLARE_BITMAP(acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) __initdata; 


static int __init acpi_gpe_set_masked_gpes(char *val)

{

	int ret;

	u8 gpe;



	if (kstrtou8(val, 0, &gpe))

		return -EINVAL;

	ret = kstrtou8(val, 0, &gpe);

	if (ret) {

		ret = bitmap_parselist(val, acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX);

		if (ret)

			return ret;

	} else

		set_bit(gpe, acpi_masked_gpes_map);



	return 1;