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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2021-06-16 20:03:33 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-06-17 17:10:11 +0200
commitd3121e64ad78ba944596d43d23914cf5f0131666 (patch)
tree519c5540d391938542232f5e728637476c3b5813 /drivers/acpi/sysfs.c
parentbdd56d7d8931e842775d2e5b93d426a8d1940e33 (diff)
downloadlinux-d3121e64ad78ba944596d43d23914cf5f0131666.tar.bz2
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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/sysfs.c')
-rw-r--r--drivers/acpi/sysfs.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index faab6f1c6165..20588c64cd1b 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -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 @@ end:
* 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
@@ -799,11 +801,16 @@ 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;
- set_bit(gpe, acpi_masked_gpes_map);
+ 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;
}