linux-kernel - [PATCH 1/4] pnp: Change pnp bus pm_ops to invoke pnp driver dev_pm

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Message-Id: <1373429366-3870-1-git-send-email-shuah.kh@samsung.com>
Date:	Tue,  9 Jul 2013 22:09:26 -0600
From:	Shuah Khan <shuah.kh@...sung.com>
To:	rafael.j.wysocki@...el.com, bhelgaas@...gle.com,
	a.zummo@...ertech.it, key@...ux.vnet.ibm.com, mail@...jiv.net,
	tpmdd@...horst.net, tpmdd@...rix.com, matthew.garrett@...ula.com
Cc:	Shuah Khan <shuah.kh@...sung.com>, linux-kernel@...r.kernel.org,
	rtc-linux@...glegroups.com, tpmdd-devel@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, shuahkhan@...il.com
Subject: [PATCH 1/4] pnp: Change pnp bus pm_ops to invoke pnp driver dev_pm_ops if specified

pnp_bus_suspend() and pnp_bus_resume() invoke legacy pm_ops from
pnp_driver. Changed pnp_bus_suspend() and pnp_bus_resume() to check
if pnp driver has dev_pm_ops and call. If dev_pm_ops don't exist, then
call use legacy pm_ops. Without this change, pnp_driver dev_pm_ops will
not get called.

Signed-off-by: Shuah Khan <shuah.kh@...sung.com>
---
 drivers/pnp/driver.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index 00e9403..c3f9e89 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -163,6 +163,13 @@ static int pnp_bus_suspend(struct device *dev, pm_message_t state)
 	if (!pnp_drv)
 		return 0;
 
+	if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) {
+		error = pnp_drv->driver.pm->suspend(dev);
+		suspend_report_result(pnp_drv->driver.pm->suspend, error);
+		if (error)
+			return error;
+	}
+
 	if (pnp_drv->suspend) {
 		error = pnp_drv->suspend(pnp_dev, state);
 		if (error)
@@ -201,6 +208,12 @@ static int pnp_bus_resume(struct device *dev)
 			return error;
 	}
 
+	if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) {
+		error = pnp_drv->driver.pm->resume(dev);
+		if (error)
+			return error;
+	}
+
 	if (pnp_drv->resume) {
 		error = pnp_drv->resume(pnp_dev);
 		if (error)
-- 
1.7.10.4

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