* Venki Pallipadi (venkatesh.pallipadi@xxxxxxxxx) wrote:
> Can you check the test patch below (over latest git) and let me know whether it
> resolves the issue.
>
the patch fixes the issue for me,
thanks a lot.
Eric
> Enable C3 without bm control only for CST based C3.
>
> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx>
>
> Index: linux-2.6/drivers/acpi/processor_idle.c
> ===================================================================
> --- linux-2.6.orig/drivers/acpi/processor_idle.c 2007-07-31 04:29:26.000000000 -0700
> +++ linux-2.6/drivers/acpi/processor_idle.c 2007-07-31 04:52:50.000000000 -0700
> @@ -969,11 +969,17 @@
> }
>
> if (pr->flags.bm_check) {
> - /* bus mastering control is necessary */
> if (!pr->flags.bm_control) {
> - /* In this case we enter C3 without bus mastering */
> - ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> - "C3 support without bus mastering control\n"));
> + if (pr->flags.has_cst != 1) {
> + /* bus mastering control is necessary */
> + ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> + "C3 support requires BM control\n"));
> + return;
> + } else {
> + /* Here we enter C3 without bus mastering */
> + ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> + "C3 support without BM control\n"));
> + }
> }
> } else {
> /*
-
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