From: Xiang Chen <chenxiang66@xxxxxxxxxxxxx>
After the patch (eb09878e1301 ("ACPI: sysfs: Change ACPI_MASKABLE_GPE_MAX to 0x100")),
the macro ACPI_MASKABLE_GPE_MAX is changed from 0xFF to 0x100. So in function
apci_gpe_apply_masked_gpes(), the variable gpe may reach 0x100 but it is
defined as u8, so it will be 0 when reaching 0x100. If the bitmap
acpi_masked_gpes_map are all 0s, it will loop all the times.
To solve endless loop in the function, define the variable gpe from u8 to u16.
Fixes: eb09878e1301 ("ACPI: sysfs: Change ACPI_MASKABLE_GPE_MAX to 0x100")
Signed-off-by: Xiang Chen <chenxiang66@xxxxxxxxxxxxx>
---
drivers/acpi/sysfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 0a83ce1..c60d2c6 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -838,7 +838,7 @@ void __init acpi_gpe_apply_masked_gpes(void)
{
acpi_handle handle;
acpi_status status;
- u8 gpe;
+ u16 gpe;
for_each_set_bit(gpe, acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) {
status = acpi_get_gpe_device(gpe, &handle);
--
2.8.1
