[PATCH 0/2] intel-hid: intel-vbtn: Suspend-related fix and update

[PATCH 0/2] intel-hid: intel-vbtn: Suspend-related fix and update

[Rafael J. Wysocki]

Hi,

These two patches fix a minor issue related to system suspend in the intel-hid
and intel-vbtn drivers and update the suspend/resume handling in intel-hid to
reduce special-casing in it somewhat.

Please refer to the changelogs for details.

Thanks,
Rafael

[PATCH 1/2] intel-hid: intel-vbtn: Avoid leaking wakeup_mode set

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Both intel-hid and intel-vbtn set a wakeup_mode flag causing them
to behave in a special way during system suspend and while suspended
in their "prepare" PM callbacks and clear it in their "resume" PM
callbacks.  That may cause the wakeup_mode flag to remain set after
a system suspend failure (if some other driver's "suspend" callback
returns an error before the "suspend" callback of either intel-hid
or intel-vbtn is invoked).

After commit 10a08fd65ec1 ("ACPI: PM: Set up EC GPE for system wakeup
from drivers that need it") that also affects the "wakeup mask" bit
of the EC GPE, which may not be cleared after a failing system
suspend.

Fix this issue by adding "complete" PM callbacks to intel-hid and
intel-vbtn to clear the wakeup_mode flag and the "wakeup mask" bit
of the EC GPE if they have not been cleared earlier.

Fixes: 10a08fd65ec1 ("ACPI: PM: Set up EC GPE for system wakeup from drivers that need it")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

The commit pointed to by the Fixes: tag above is in linux-next only ATM.

The problem had been there before that commit, but it wasn't fixed by it and
the fix depends on that commit.


---
 drivers/platform/x86/intel-hid.c  |   17 ++++++++++++-----
 drivers/platform/x86/intel-vbtn.c |   12 +++++++++---
 2 files changed, 21 insertions(+), 8 deletions(-)

Index: linux-pm/drivers/platform/x86/intel-hid.c
===================================================================
--- linux-pm.orig/drivers/platform/x86/intel-hid.c
+++ linux-pm/drivers/platform/x86/intel-hid.c
@@ -262,6 +262,16 @@ static int intel_hid_pm_prepare(struct d
 	return 0;
 }
 
+static void intel_hid_pm_complete(struct device *device)
+{
+	struct intel_hid_priv *priv = dev_get_drvdata(device);
+
+	if (priv->wakeup_mode) {
+		acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE);
+		priv->wakeup_mode = false;
+	}
+}
+
 static int intel_hid_pl_suspend_handler(struct device *device)
 {
 	if (pm_suspend_via_firmware()) {
@@ -273,12 +283,8 @@ static int intel_hid_pl_suspend_handler(
 
 static int intel_hid_pl_resume_handler(struct device *device)
 {
-	if (device_may_wakeup(device)) {
-		struct intel_hid_priv *priv = dev_get_drvdata(device);
+	intel_hid_pm_complete(device);
 
-		acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE);
-		priv->wakeup_mode = false;
-	}
 	if (pm_resume_via_firmware()) {
 		intel_hid_set_enable(device, true);
 		intel_button_array_enable(device, true);
@@ -288,6 +294,7 @@ static int intel_hid_pl_resume_handler(s
 
 static const struct dev_pm_ops intel_hid_pl_pm_ops = {
 	.prepare = intel_hid_pm_prepare,
+	.complete = intel_hid_pm_complete,
 	.freeze  = intel_hid_pl_suspend_handler,
 	.thaw  = intel_hid_pl_resume_handler,
 	.restore  = intel_hid_pl_resume_handler,
Index: linux-pm/drivers/platform/x86/intel-vbtn.c
===================================================================
--- linux-pm.orig/drivers/platform/x86/intel-vbtn.c
+++ linux-pm/drivers/platform/x86/intel-vbtn.c
@@ -210,19 +210,25 @@ static int intel_vbtn_pm_prepare(struct
 	return 0;
 }
 
-static int intel_vbtn_pm_resume(struct device *dev)
+static void intel_vbtn_pm_complete(struct device *dev)
 {
-	if (device_may_wakeup(dev)) {
-		struct intel_vbtn_priv *priv = dev_get_drvdata(dev);
+	struct intel_vbtn_priv *priv = dev_get_drvdata(dev);
 
+	if (priv->wakeup_mode) {
 		acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE);
 		priv->wakeup_mode = false;
 	}
+}
+
+static int intel_vbtn_pm_resume(struct device *dev)
+{
+	intel_vbtn_pm_complete(dev);
 	return 0;
 }
 
 static const struct dev_pm_ops intel_vbtn_pm_ops = {
 	.prepare = intel_vbtn_pm_prepare,
+	.complete = intel_vbtn_pm_complete,
 	.resume = intel_vbtn_pm_resume,
 	.restore = intel_vbtn_pm_resume,
 	.thaw = intel_vbtn_pm_resume,

[PATCH 2/2] intel-hid: Disable button array during suspend-to-idle

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Notice that intel_button_array_enable() never disables the power
button which is the only one needed to wake up the system from
suspend-to-idle, so it can be safely called during suspend-to-idle
as well as during "regular" system suspend, and rearrange the
code in the driver's "suspend" and "resume" callbacks accordingly.

While at it, use pm_suspend_no_platform() to check if the current
suspend-resume cycle is suspend-to-idle, as that is the only
case when the device should be enabled while suspended.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/platform/x86/intel-hid.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

Index: linux-pm/drivers/platform/x86/intel-hid.c
===================================================================
--- linux-pm.orig/drivers/platform/x86/intel-hid.c
+++ linux-pm/drivers/platform/x86/intel-hid.c
@@ -274,10 +274,11 @@ static void intel_hid_pm_complete(struct
 
 static int intel_hid_pl_suspend_handler(struct device *device)
 {
-	if (pm_suspend_via_firmware()) {
+	intel_button_array_enable(device, false);
+
+	if (!pm_suspend_no_platform())
 		intel_hid_set_enable(device, false);
-		intel_button_array_enable(device, false);
-	}
+
 	return 0;
 }
 
@@ -285,10 +286,10 @@ static int intel_hid_pl_resume_handler(s
 {
 	intel_hid_pm_complete(device);
 
-	if (pm_resume_via_firmware()) {
+	if (!pm_suspend_no_platform())
 		intel_hid_set_enable(device, true);
-		intel_button_array_enable(device, true);
-	}
+
+	intel_button_array_enable(device, true);
 	return 0;
 }
 

Re: [PATCH 0/2] intel-hid: intel-vbtn: Suspend-related fix and update

[Andy Shevchenko]

On Thu, Aug 08, 2019 at 10:40:19AM +0200, Rafael J. Wysocki wrote:
> Hi,
> 
> These two patches fix a minor issue related to system suspend in the intel-hid
> and intel-vbtn drivers and update the suspend/resume handling in intel-hid to
> reduce special-casing in it somewhat.
> 

AFAIR the original patches go via other than PDx86 tree.
Thus, while patches are looking good to me,

Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

> Please refer to the changelogs for details.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 0/2] intel-hid: intel-vbtn: Suspend-related fix and update

[Rafael J. Wysocki]

On Thu, Aug 8, 2019 at 1:19 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> On Thu, Aug 08, 2019 at 10:40:19AM +0200, Rafael J. Wysocki wrote:
> > Hi,
> >
> > These two patches fix a minor issue related to system suspend in the intel-hid
> > and intel-vbtn drivers and update the suspend/resume handling in intel-hid to
> > reduce special-casing in it somewhat.
> >
>
> AFAIR the original patches go via other than PDx86 tree.

That's correct.

> Thus, while patches are looking good to me,
>
> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Thanks!