ACPICA: Update acpi_get_timer for 64-bit interface to acpi_hw_read

ACPICA commit 1cdcf16447c15694faa564c0cd8e357b910344a0

Return value from acpi_hw_read is now 64 bits, but the ACPI PM
Timer is defined by the ACPI spec to be 32 bits.

Link: https://github.com/acpica/acpica/commit/1cdcf16447c1
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/acpi/acpica/hwtimer.c b/drivers/acpi/acpica/hwtimer.c
index b3c5d8c754bb..a2f4e25d45b1 100644
--- a/drivers/acpi/acpica/hwtimer.c
+++ b/drivers/acpi/acpica/hwtimer.c
@@ -94,6 +94,7 @@ ACPI_EXPORT_SYMBOL(acpi_get_timer_resolution)
 acpi_status acpi_get_timer(u32 * ticks)
 {
         acpi_status status;
+        u64 timer_value;
 
         ACPI_FUNCTION_TRACE(acpi_get_timer);
 
@@ -107,7 +108,14 @@ acpi_status acpi_get_timer(u32 * ticks)
                 return_ACPI_STATUS(AE_SUPPORT);
         }
 
-        status = acpi_hw_read(ticks, &acpi_gbl_FADT.xpm_timer_block);
+        status = acpi_hw_read(&timer_value, &acpi_gbl_FADT.xpm_timer_block);
+        if (ACPI_SUCCESS(status)) {
+
+                /* ACPI PM Timer is defined to be 32 bits (PM_TMR_LEN) */
+
+                *ticks = (u32)timer_value;
+        }
+
         return_ACPI_STATUS(status);
 }