diff options
| -rw-r--r-- | drivers/acpi/processor_idle.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index af9f2afd72da..f8d2b2f47fd4 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -287,10 +287,10 @@ static void acpi_processor_idle(void) pr->power.bm_check_timestamp = jiffies; /* - * Apply bus mastering demotion policy. Automatically demote + * If bus mastering is or was active this jiffy, demote * to avoid a faulty transition. Note that the processor * won't enter a low-power state during this call (to this - * funciton) but should upon the next. + * function) but should upon the next. * * TBD: A better policy might be to fallback to the demotion * state (use it for this quantum only) istead of @@ -298,7 +298,8 @@ static void acpi_processor_idle(void) * qualification. This may, however, introduce DMA * issues (e.g. floppy DMA transfer overrun/underrun). */ - if (pr->power.bm_activity & cx->demotion.threshold.bm) { + if ((pr->power.bm_activity & 0x1) && + cx->demotion.threshold.bm) { local_irq_enable(); next_state = cx->demotion.state; goto end; |