Re: [RFC/RFT][PATCH 4/5] ACPI / LPSS: Support for device latencytolerance PM QoS

From: Mika Westerberg
Date: Mon Jan 20 2014 - 06:08:22 EST


On Fri, Jan 17, 2014 at 03:46:40PM +0100, Rafael J. Wysocki wrote:
> @@ -415,11 +472,12 @@ static int acpi_lpss_platform_notify(str
> return 0;
> }
>
> - if (action == BUS_NOTIFY_ADD_DEVICE)
> + if (action == BUS_NOTIFY_ADD_DEVICE) {
> ret = sysfs_create_group(&pdev->dev.kobj, &lpss_attr_group);
> - else if (action == BUS_NOTIFY_DEL_DEVICE)
> + pdev->dev.power.set_latency_tolerance = acpi_lpss_set_ltr;

While trying to test this I noticed that BUS_NOTIFY_ADD_DEVICE happens
after call to dpm_sysfs_add(), so LTR field is never exposed to the
userspace.

> + } else if (action == BUS_NOTIFY_DEL_DEVICE) {
> sysfs_remove_group(&pdev->dev.kobj, &lpss_attr_group);
> -
> + }
> return ret;
> }
>
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