Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Vaibhav Gupta <vaibhavgupta40@gmail.com>
To:     Bjorn Helgaas <helgaas@kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>, bjorn@helgaas.com,
        Vaibhav Gupta <vaibhav.varodek@gmail.com>,
        "David S. Miller" <davem@davemloft.net>
Cc:     Vaibhav Gupta <vaibhavgupta40@gmail.com>,
        linux-kernel@vger.kernel.org,
        linux-kernel-mentees@lists.linuxfoundation.org,
        skhan@linuxfoundation.org, linux-ide@vger.kernel.org
Subject: [PATCH v3 1/3] ide: use generic power management
Date:   Mon, 13 Jul 2020 23:06:11 +0530
Message-Id: <20200713173613.2095-2-vaibhavgupta40@gmail.com>
In-Reply-To: <20200713173613.2095-1-vaibhavgupta40@gmail.com>
References: <20200713173613.2095-1-vaibhavgupta40@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Earlier, drivers had to manage the device's power states, and related
operations, themselves. With the generic approach, these are done by PCI
core.

The ide_pci_suspend() and ide_pci_resume(), declared in
include/linux/ide.h and defined in drivers/ide/setup-pci.c, were external
and were exported. Those were then used by other source files.

Now, as they have to bind with dev_pm_ops object, there is no need to
export them and they can be made static.

Declare an extern const dev_pm_ops object in include/linux/ide.h and define
it in drivers/ide/setup-pci.c with SIMPLE_DEV_PM_OPS macro, binding
suspend, and resume callbacks with it. This object can now be used by other
source files.

The following source files are binding same dev_pm_ops object in their PM:
    drivers/ide/aec62xx.c
    drivers/ide/alim15x3.c
    drivers/ide/amd74xx.c
    drivers/ide/atiixp.c
    drivers/ide/cmd64x.c
    drivers/ide/cs5520.c
    drivers/ide/cs5530.c
    drivers/ide/cs5535.c
    drivers/ide/cs5536.c
    drivers/ide/cy82c693.c
    drivers/ide/hpt366.c
    drivers/ide/ide-pci-generic.c
    drivers/ide/it8172.c
    drivers/ide/it8213.c
    drivers/ide/it821x.c
    drivers/ide/jmicron.c
    drivers/ide/ns87415.c
    drivers/ide/opti621.c
    drivers/ide/pdc202xx_new.c
    drivers/ide/pdc202xx_old.c
    drivers/ide/piix.c
    drivers/ide/serverworks.c
    drivers/ide/setup-pci.c
    drivers/ide/siimage.c
    drivers/ide/sis5513.c
    drivers/ide/sl82c105.c
    drivers/ide/slc90e66.c
    drivers/ide/via82cxxx.c
    include/linux/ide.h

The drivers/ide/triflex.c driver was also using ide_pci_resume() callback
but it had its own definition for .suspend() as it does not want to power
off the device during suspend. Hence, disable its PM explicitly inside
triflex_init_one() as "dev->pm_caps = 0".

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
---
 drivers/ide/aec62xx.c         |  3 +--
 drivers/ide/alim15x3.c        |  3 +--
 drivers/ide/amd74xx.c         |  3 +--
 drivers/ide/atiixp.c          |  3 +--
 drivers/ide/cmd64x.c          |  3 +--
 drivers/ide/cs5520.c          |  3 +--
 drivers/ide/cs5530.c          |  3 +--
 drivers/ide/cs5535.c          |  3 +--
 drivers/ide/cs5536.c          |  3 +--
 drivers/ide/cy82c693.c        |  3 +--
 drivers/ide/hpt366.c          |  3 +--
 drivers/ide/ide-pci-generic.c |  3 +--
 drivers/ide/it8172.c          |  3 +--
 drivers/ide/it8213.c          |  3 +--
 drivers/ide/it821x.c          |  3 +--
 drivers/ide/jmicron.c         |  3 +--
 drivers/ide/ns87415.c         |  3 +--
 drivers/ide/opti621.c         |  3 +--
 drivers/ide/pdc202xx_new.c    |  3 +--
 drivers/ide/pdc202xx_old.c    |  3 +--
 drivers/ide/piix.c            |  3 +--
 drivers/ide/serverworks.c     |  3 +--
 drivers/ide/setup-pci.c       | 29 ++++++-----------------------
 drivers/ide/siimage.c         |  3 +--
 drivers/ide/sis5513.c         |  3 +--
 drivers/ide/sl82c105.c        |  3 +--
 drivers/ide/slc90e66.c        |  3 +--
 drivers/ide/triflex.c         | 24 ++++++++----------------
 drivers/ide/via82cxxx.c       |  3 +--
 include/linux/ide.h           |  8 +-------
 30 files changed, 42 insertions(+), 100 deletions(-)

diff --git a/drivers/ide/aec62xx.c b/drivers/ide/aec62xx.c
index 4c959ce41ba9..375c7b4946f1 100644
--- a/drivers/ide/aec62xx.c
+++ b/drivers/ide/aec62xx.c
@@ -309,8 +309,7 @@ static struct pci_driver aec62xx_pci_driver = {
 	.id_table	= aec62xx_pci_tbl,
 	.probe		= aec62xx_init_one,
 	.remove		= aec62xx_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init aec62xx_ide_init(void)
diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c
index 3265970aee34..a5043e048f91 100644
--- a/drivers/ide/alim15x3.c
+++ b/drivers/ide/alim15x3.c
@@ -580,8 +580,7 @@ static struct pci_driver alim15x3_pci_driver = {
 	.id_table	= alim15x3_pci_tbl,
 	.probe		= alim15x3_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init ali15x3_ide_init(void)
diff --git a/drivers/ide/amd74xx.c b/drivers/ide/amd74xx.c
index 7340597a373e..a9eb64b3e480 100644
--- a/drivers/ide/amd74xx.c
+++ b/drivers/ide/amd74xx.c
@@ -321,8 +321,7 @@ static struct pci_driver amd74xx_pci_driver = {
 	.id_table	= amd74xx_pci_tbl,
 	.probe		= amd74xx_probe,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init amd74xx_ide_init(void)
diff --git a/drivers/ide/atiixp.c b/drivers/ide/atiixp.c
index e08b0aac08b9..0bc98d5abaf4 100644
--- a/drivers/ide/atiixp.c
+++ b/drivers/ide/atiixp.c
@@ -190,8 +190,7 @@ static struct pci_driver atiixp_pci_driver = {
 	.id_table	= atiixp_pci_tbl,
 	.probe		= atiixp_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init atiixp_ide_init(void)
diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c
index 943bf944bf72..480898a76133 100644
--- a/drivers/ide/cmd64x.c
+++ b/drivers/ide/cmd64x.c
@@ -430,8 +430,7 @@ static struct pci_driver cmd64x_pci_driver = {
 	.id_table	= cmd64x_pci_tbl,
 	.probe		= cmd64x_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init cmd64x_ide_init(void)
diff --git a/drivers/ide/cs5520.c b/drivers/ide/cs5520.c
index 89a4ff100b7a..ba0a5bc03d76 100644
--- a/drivers/ide/cs5520.c
+++ b/drivers/ide/cs5520.c
@@ -152,8 +152,7 @@ static struct pci_driver cs5520_pci_driver = {
 	.name		= "Cyrix_IDE",
 	.id_table	= cs5520_pci_tbl,
 	.probe		= cs5520_init_one,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init cs5520_ide_init(void)
diff --git a/drivers/ide/cs5530.c b/drivers/ide/cs5530.c
index 65371599b976..5bb46e7130c8 100644
--- a/drivers/ide/cs5530.c
+++ b/drivers/ide/cs5530.c
@@ -273,8 +273,7 @@ static struct pci_driver cs5530_pci_driver = {
 	.id_table	= cs5530_pci_tbl,
 	.probe		= cs5530_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init cs5530_ide_init(void)
diff --git a/drivers/ide/cs5535.c b/drivers/ide/cs5535.c
index 70fdbe3161f8..c5b79f84d274 100644
--- a/drivers/ide/cs5535.c
+++ b/drivers/ide/cs5535.c
@@ -194,8 +194,7 @@ static struct pci_driver cs5535_pci_driver = {
 	.id_table	= cs5535_pci_tbl,
 	.probe		= cs5535_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init cs5535_ide_init(void)
diff --git a/drivers/ide/cs5536.c b/drivers/ide/cs5536.c
index 8b5ca145191b..827cc6843934 100644
--- a/drivers/ide/cs5536.c
+++ b/drivers/ide/cs5536.c
@@ -279,8 +279,7 @@ static struct pci_driver cs5536_pci_driver = {
 	.id_table	= cs5536_pci_tbl,
 	.probe		= cs5536_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 module_pci_driver(cs5536_pci_driver);
diff --git a/drivers/ide/cy82c693.c b/drivers/ide/cy82c693.c
index bc01660ee8fd..511a870a352c 100644
--- a/drivers/ide/cy82c693.c
+++ b/drivers/ide/cy82c693.c
@@ -212,8 +212,7 @@ static struct pci_driver cy82c693_pci_driver = {
 	.id_table	= cy82c693_pci_tbl,
 	.probe		= cy82c693_init_one,
 	.remove		= cy82c693_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init cy82c693_ide_init(void)
diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c
index fd3b5da44619..ecf58153ac8d 100644
--- a/drivers/ide/hpt366.c
+++ b/drivers/ide/hpt366.c
@@ -1523,8 +1523,7 @@ static struct pci_driver hpt366_pci_driver = {
 	.id_table	= hpt366_pci_tbl,
 	.probe		= hpt366_init_one,
 	.remove		= hpt366_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init hpt366_ide_init(void)
diff --git a/drivers/ide/ide-pci-generic.c b/drivers/ide/ide-pci-generic.c
index 673420db953f..cc677fbed6f1 100644
--- a/drivers/ide/ide-pci-generic.c
+++ b/drivers/ide/ide-pci-generic.c
@@ -181,8 +181,7 @@ static struct pci_driver generic_pci_driver = {
 	.id_table	= generic_pci_tbl,
 	.probe		= generic_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init generic_ide_init(void)
diff --git a/drivers/ide/it8172.c b/drivers/ide/it8172.c
index b6f674ab4fb7..d3b5147af7dd 100644
--- a/drivers/ide/it8172.c
+++ b/drivers/ide/it8172.c
@@ -143,8 +143,7 @@ static struct pci_driver it8172_pci_driver = {
 	.id_table	= it8172_pci_tbl,
 	.probe		= it8172_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init it8172_ide_init(void)
diff --git a/drivers/ide/it8213.c b/drivers/ide/it8213.c
index d0bf4430c437..56bc08ce5805 100644
--- a/drivers/ide/it8213.c
+++ b/drivers/ide/it8213.c
@@ -195,8 +195,7 @@ static struct pci_driver it8213_pci_driver = {
 	.id_table	= it8213_pci_tbl,
 	.probe		= it8213_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init it8213_ide_init(void)
diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c
index 36a64c8ea575..aad746007330 100644
--- a/drivers/ide/it821x.c
+++ b/drivers/ide/it821x.c
@@ -690,8 +690,7 @@ static struct pci_driver it821x_pci_driver = {
 	.id_table	= it821x_pci_tbl,
 	.probe		= it821x_init_one,
 	.remove		= it821x_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init it821x_ide_init(void)
diff --git a/drivers/ide/jmicron.c b/drivers/ide/jmicron.c
index ae6480dcbadf..0fff50e712a2 100644
--- a/drivers/ide/jmicron.c
+++ b/drivers/ide/jmicron.c
@@ -154,8 +154,7 @@ static struct pci_driver jmicron_pci_driver = {
 	.id_table	= jmicron_pci_tbl,
 	.probe		= jmicron_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init jmicron_ide_init(void)
diff --git a/drivers/ide/ns87415.c b/drivers/ide/ns87415.c
index 11a672aba6ee..25c99265e85b 100644
--- a/drivers/ide/ns87415.c
+++ b/drivers/ide/ns87415.c
@@ -328,8 +328,7 @@ static struct pci_driver ns87415_pci_driver = {
 	.id_table	= ns87415_pci_tbl,
 	.probe		= ns87415_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init ns87415_ide_init(void)
diff --git a/drivers/ide/opti621.c b/drivers/ide/opti621.c
index c374f82333c6..9fa84e709c43 100644
--- a/drivers/ide/opti621.c
+++ b/drivers/ide/opti621.c
@@ -157,8 +157,7 @@ static struct pci_driver opti621_pci_driver = {
 	.id_table	= opti621_pci_tbl,
 	.probe		= opti621_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init opti621_ide_init(void)
diff --git a/drivers/ide/pdc202xx_new.c b/drivers/ide/pdc202xx_new.c
index 4fcafb9121e0..7c276b8aeb5f 100644
--- a/drivers/ide/pdc202xx_new.c
+++ b/drivers/ide/pdc202xx_new.c
@@ -535,8 +535,7 @@ static struct pci_driver pdc202new_pci_driver = {
 	.id_table	= pdc202new_pci_tbl,
 	.probe		= pdc202new_init_one,
 	.remove		= pdc202new_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init pdc202new_ide_init(void)
diff --git a/drivers/ide/pdc202xx_old.c b/drivers/ide/pdc202xx_old.c
index 5248ac064e6e..a902028dd5d2 100644
--- a/drivers/ide/pdc202xx_old.c
+++ b/drivers/ide/pdc202xx_old.c
@@ -340,8 +340,7 @@ static struct pci_driver pdc202xx_pci_driver = {
 	.id_table	= pdc202xx_pci_tbl,
 	.probe		= pdc202xx_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init pdc202xx_ide_init(void)
diff --git a/drivers/ide/piix.c b/drivers/ide/piix.c
index a671cead6ae7..2634768a4e66 100644
--- a/drivers/ide/piix.c
+++ b/drivers/ide/piix.c
@@ -453,8 +453,7 @@ static struct pci_driver piix_pci_driver = {
 	.id_table	= piix_pci_tbl,
 	.probe		= piix_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init piix_ide_init(void)
diff --git a/drivers/ide/serverworks.c b/drivers/ide/serverworks.c
index 458e72e034b0..cdc05b23e03b 100644
--- a/drivers/ide/serverworks.c
+++ b/drivers/ide/serverworks.c
@@ -434,8 +434,7 @@ static struct pci_driver svwks_pci_driver = {
 	.id_table	= svwks_pci_tbl,
 	.probe		= svwks_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init svwks_ide_init(void)
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index fdc8e813170c..1a8fb033e4b3 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -648,35 +648,18 @@ void ide_pci_remove(struct pci_dev *dev)
 }
 EXPORT_SYMBOL_GPL(ide_pci_remove);
 
-#ifdef CONFIG_PM
-int ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
-{
-	pci_save_state(dev);
-	pci_disable_device(dev);
-	pci_set_power_state(dev, pci_choose_state(dev, state));
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(ide_pci_suspend);
+#define ide_pci_suspend NULL
 
-int ide_pci_resume(struct pci_dev *dev)
+static int __maybe_unused ide_pci_resume(struct device *dev_d)
 {
+	struct pci_dev *dev = to_pci_dev(dev_d);
 	struct ide_host *host = pci_get_drvdata(dev);
-	int rc;
-
-	pci_set_power_state(dev, PCI_D0);
-
-	rc = pci_enable_device(dev);
-	if (rc)
-		return rc;
-
-	pci_restore_state(dev);
-	pci_set_master(dev);
 
 	if (host->init_chipset)
 		host->init_chipset(dev);
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(ide_pci_resume);
-#endif
+
+SIMPLE_DEV_PM_OPS(ide_pci_pm_ops, ide_pci_suspend, ide_pci_resume);
+EXPORT_SYMBOL_GPL(ide_pci_pm_ops);
diff --git a/drivers/ide/siimage.c b/drivers/ide/siimage.c
index c4b20f350b84..198847488cc6 100644
--- a/drivers/ide/siimage.c
+++ b/drivers/ide/siimage.c
@@ -821,8 +821,7 @@ static struct pci_driver siimage_pci_driver = {
 	.id_table	= siimage_pci_tbl,
 	.probe		= siimage_init_one,
 	.remove		= siimage_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init siimage_ide_init(void)
diff --git a/drivers/ide/sis5513.c b/drivers/ide/sis5513.c
index 024bc7ba49ee..410eddd3629f 100644
--- a/drivers/ide/sis5513.c
+++ b/drivers/ide/sis5513.c
@@ -615,8 +615,7 @@ static struct pci_driver sis5513_pci_driver = {
 	.id_table	= sis5513_pci_tbl,
 	.probe		= sis5513_init_one,
 	.remove		= sis5513_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init sis5513_ide_init(void)
diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c
index 5c24c420c438..4ad5c6bce2b7 100644
--- a/drivers/ide/sl82c105.c
+++ b/drivers/ide/sl82c105.c
@@ -346,8 +346,7 @@ static struct pci_driver sl82c105_pci_driver = {
 	.id_table	= sl82c105_pci_tbl,
 	.probe		= sl82c105_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init sl82c105_ide_init(void)
diff --git a/drivers/ide/slc90e66.c b/drivers/ide/slc90e66.c
index f521d5ebf916..cd47445fda1f 100644
--- a/drivers/ide/slc90e66.c
+++ b/drivers/ide/slc90e66.c
@@ -160,8 +160,7 @@ static struct pci_driver slc90e66_pci_driver = {
 	.id_table	= slc90e66_pci_tbl,
 	.probe		= slc90e66_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init slc90e66_ide_init(void)
diff --git a/drivers/ide/triflex.c b/drivers/ide/triflex.c
index 16ddd0956832..f08a71c2ab63 100644
--- a/drivers/ide/triflex.c
+++ b/drivers/ide/triflex.c
@@ -91,6 +91,13 @@ static const struct ide_port_info triflex_device = {
 
 static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
+	/*
+	 * We must not disable or powerdown the device.
+	 * APM bios refuses to suspend if IDE is not accessible.
+	 */
+	dev->pm_cap = 0;
+	dev_info(&dev->dev, "Disable triflex to be turned off by PCI CORE\n");
+
 	return ide_pci_init_one(dev, &triflex_device, NULL);
 }
 
@@ -100,27 +107,12 @@ static const struct pci_device_id triflex_pci_tbl[] = {
 };
 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 
-#ifdef CONFIG_PM
-static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
-{
-	/*
-	 * We must not disable or powerdown the device.
-	 * APM bios refuses to suspend if IDE is not accessible.
-	 */
-	pci_save_state(dev);
-	return 0;
-}
-#else
-#define triflex_ide_pci_suspend NULL
-#endif
-
 static struct pci_driver triflex_pci_driver = {
 	.name		= "TRIFLEX_IDE",
 	.id_table	= triflex_pci_tbl,
 	.probe		= triflex_init_one,
 	.remove		= ide_pci_remove,
-	.suspend	= triflex_ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init triflex_ide_init(void)
diff --git a/drivers/ide/via82cxxx.c b/drivers/ide/via82cxxx.c
index 63a3aca506fc..166feaeed6e3 100644
--- a/drivers/ide/via82cxxx.c
+++ b/drivers/ide/via82cxxx.c
@@ -510,8 +510,7 @@ static struct pci_driver via_pci_driver = {
 	.id_table 	= via_pci_tbl,
 	.probe 		= via_init_one,
 	.remove		= via_remove,
-	.suspend	= ide_pci_suspend,
-	.resume		= ide_pci_resume,
+	.driver.pm	= &ide_pci_pm_ops,
 };
 
 static int __init via_ide_init(void)
diff --git a/include/linux/ide.h b/include/linux/ide.h
index a254841bd315..77b41103e12b 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1394,13 +1394,7 @@ int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
 		     const struct ide_port_info *, void *);
 void ide_pci_remove(struct pci_dev *);
 
-#ifdef CONFIG_PM
-int ide_pci_suspend(struct pci_dev *, pm_message_t);
-int ide_pci_resume(struct pci_dev *);
-#else
-#define ide_pci_suspend NULL
-#define ide_pci_resume NULL
-#endif
+extern const struct dev_pm_ops ide_pci_pm_ops;
 
 void ide_map_sg(ide_drive_t *, struct ide_cmd *);
 void ide_init_sg_cmd(struct ide_cmd *, unsigned int);
-- 
2.27.0