linux-kernel - Re: [PATCH] ACPI/PCI: PM: Add missing wakeup.flags.valid checks

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Message-ID: <20190517073214.GA2781@lahna.fi.intel.com>
Date:   Fri, 17 May 2019 10:32:14 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH] ACPI/PCI: PM: Add missing wakeup.flags.valid checks

On Thu, May 16, 2019 at 12:42:20PM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Both acpi_pci_need_resume() and acpi_dev_needs_resume() check if the
> current ACPI wakeup configuration of the device matches what is
> expected as far as system wakeup from sleep states is concerned, as
> reflected by the device_may_wakeup() return value for the device.
> 
> However, they only should do that if wakeup.flags.valid is set for
> the device's ACPI companion, because otherwise the wakeup.prepare_count
> value for it is meaningless.
> 
> Add the missing wakeup.flags.valid checks to these functions.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>