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From: Mika Westerberg <>
To: "Rafael J. Wysocki" <>
Cc: Linux ACPI <>,
	LKML <>,
	Linux PM <>,
	Linux PCI <>,
	"Rafael J. Wysocki" <>,
	Bjorn Helgaas <>,
	Kai-Heng Feng <>
Subject: Re: [PATCH v1 2/2] PM: ACPI: Refresh wakeup device power configuration every time
Date: Wed, 25 Nov 2020 10:09:10 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <1717218.WU8ttdIIEu@kreacher>

On Tue, Nov 24, 2020 at 08:46:38PM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <>
> When wakeup signaling is enabled for a bridge for the second (or every
> next) time in a row, its existing device wakeup power configuration
> may not match the new conditions.  For example, some devices below
> it may have been put into low-power states and that changes the
> device wakeup power conditions or similar.  This causes functional
> problems to appear on some systems (for example,  because of it the
> Thunderbolt port on Dell Precision 5550 cannot detect devices plugged
> in after it has been suspended).
> For this reason, modify __acpi_device_wakeup_enable() to refresh the
> device wakeup power configuration of the target device on every
> invocation, not just when it is called for that device first time
> in a row.
> Signed-off-by: Rafael J. Wysocki <>
> Reported-by: Kai-Heng Feng <>
> Tested-by: Kai-Heng Feng <>

Reviewed-by: Mika Westerberg <>

      reply	other threads:[~2020-11-25  8:09 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-24 19:41 [PATCH v1 0/2] PM: ACPI: PCI: Address issues related to signaling wakeup from bridges Rafael J. Wysocki
2020-11-24 19:44 ` [PATCH v1 1/2] PM: ACPI: PCI: Drop acpi_pm_set_bridge_wakeup() Rafael J. Wysocki
2020-11-25  8:06   ` Mika Westerberg
2020-12-04 23:21   ` Bjorn Helgaas
2020-11-24 19:46 ` [PATCH v1 2/2] PM: ACPI: Refresh wakeup device power configuration every time Rafael J. Wysocki
2020-11-25  8:09   ` Mika Westerberg [this message]

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