Displaying 1 result from an estimated 1 matches for "acpi_bitreg_bus_master_rld".
2013 Nov 11
1
[PATCH] x86/idle: reduce contention on ACPI register accesses
...i_set_register() is always being called once below. Newer
+ * chipsets handle DMA during C3 automatically and BM_RLD is a
+ * NOP. In either case, the proper way to handle BM_RLD is to
+ * set it and leave it set.
*/
- acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 1);
}
else
{
@@ -875,7 +872,13 @@ static int check_cx(struct acpi_processo
" for C3 to be enabled on SMP systems\n"));
return -EINVAL;
}
- acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 0);
+...