ACK: [PATCH 1/1] ACPI / LPSS: Force LPSS quirks on boot

[Anthony Wong]

On Thu, Nov 22, 2018 at 04:18:07PM +0800, Aaron Ma wrote:
> From: Zhang Rui <rui.zhang at intel.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1804604
> 
> Commit 12864ff8545f (ACPI / LPSS: Avoid PM quirks on suspend and resume
> from hibernation) bypasses lpss quirks for S3 and S4, by setting a flag
> for S3/S4 in acpi_lpss_suspend(), and check that flag in
> acpi_lpss_resume().
> 
> But this overlooks the boot case where acpi_lpss_resume() may get called
> without a corresponding acpi_lpss_suspend() having been called.
> 
> Thus force setting the flag during boot.
> 
> Fixes: 12864ff8545f (ACPI / LPSS: Avoid PM quirks on suspend and resume from hibernation)
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=200989
> Reported-and-tested-by: William Lieurance <william.lieurance at namikoda.com>
> Signed-off-by: Zhang Rui <rui.zhang at intel.com>
> Cc: 4.15+ <stable at vger.kernel.org> # 4.15+: 12864ff8545f (ACPI / LPSS: Avoid ...)
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
> (cherry picked from commit f11fc4bc669b8622510c1039499f5a9d24248fec)
> Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
> ---
>  drivers/acpi/acpi_lpss.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
> index 8e37c2317e27..08b2ceb68066 100644
> --- a/drivers/acpi/acpi_lpss.c
> +++ b/drivers/acpi/acpi_lpss.c
> @@ -736,7 +736,7 @@ static void acpi_lpss_dismiss(struct device *dev)
>  #define LPSS_GPIODEF0_DMA_LLP		BIT(13)
>  
>  static DEFINE_MUTEX(lpss_iosf_mutex);
> -static bool lpss_iosf_d3_entered;
> +static bool lpss_iosf_d3_entered = true;
>  
>  static void lpss_iosf_enter_d3_state(void)
>  {
> -- 
> 2.17.1

Acked-by: Anthony Wong <anthony.wong at canonical.com>