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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt1
-rw-r--r--drivers/acpi/sysfs.c26
2 files changed, 8 insertions, 19 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 6571fbfdb2a1..89ba74761180 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -114,7 +114,6 @@
This facility can be used to prevent such uncontrolled
GPE floodings.
Format: <int>
- Support masking of GPEs numbered from 0x00 to 0x7f.
acpi_no_auto_serialize [HW,ACPI]
Disable auto-serialization of AML methods
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 06a150bb35bf..4fc59c3bc673 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -816,14 +816,8 @@ end:
* interface:
* echo unmask > /sys/firmware/acpi/interrupts/gpe00
*/
-
-/*
- * Currently, the GPE flooding prevention only supports to mask the GPEs
- * numbered from 00 to 7f.
- */
-#define ACPI_MASKABLE_GPE_MAX 0x80
-
-static u64 __initdata acpi_masked_gpes;
+#define ACPI_MASKABLE_GPE_MAX 0xFF
+static DECLARE_BITMAP(acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) __initdata;
static int __init acpi_gpe_set_masked_gpes(char *val)
{
@@ -831,7 +825,7 @@ static int __init acpi_gpe_set_masked_gpes(char *val)
if (kstrtou8(val, 0, &gpe) || gpe > ACPI_MASKABLE_GPE_MAX)
return -EINVAL;
- acpi_masked_gpes |= ((u64)1<<gpe);
+ set_bit(gpe, acpi_masked_gpes_map);
return 1;
}
@@ -843,15 +837,11 @@ void __init acpi_gpe_apply_masked_gpes(void)
acpi_status status;
u8 gpe;
- for (gpe = 0;
- gpe < min_t(u8, ACPI_MASKABLE_GPE_MAX, acpi_current_gpe_count);
- gpe++) {
- if (acpi_masked_gpes & ((u64)1<<gpe)) {
- status = acpi_get_gpe_device(gpe, &handle);
- if (ACPI_SUCCESS(status)) {
- pr_info("Masking GPE 0x%x.\n", gpe);
- (void)acpi_mask_gpe(handle, gpe, TRUE);
- }
+ for_each_set_bit(gpe, acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) {
+ status = acpi_get_gpe_device(gpe, &handle);
+ if (ACPI_SUCCESS(status)) {
+ pr_info("Masking GPE 0x%x.\n", gpe);
+ (void)acpi_mask_gpe(handle, gpe, TRUE);
}
}
}

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