The 2.6.29 kernel has new struct dev_pm_ops [1] which are used
on the pci device to distinguish power management hooks for suspend
to RAM and hibernation. Older kernels don't have these so we need
to resort back to the good ol' suspend/resume. Fortunately the calls
are not so different so it should be possible to resuse the same
calls on compat code with only slight modifications.

[1] http://lxr.linux.no/#linux+v2.6.29/include/linux/pm.h#L170

--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -2897,6 +2897,9 @@ static struct pci_error_handlers atl1c_e
 
 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
 
+compat_pci_suspend(atl1c_suspend)
+compat_pci_resume(atl1c_resume)
+
 static struct pci_driver atl1c_driver = {
 	.name     = atl1c_driver_name,
 	.id_table = atl1c_pci_tbl,
@@ -2904,7 +2907,12 @@ static struct pci_driver atl1c_driver =
 	.remove   = __devexit_p(atl1c_remove),
 	.shutdown = atl1c_shutdown,
 	.err_handler = &atl1c_err_handler,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 	.driver.pm = &atl1c_pm_ops,
+#elif defined(CONFIG_PM_SLEEP)
+	.suspend        = atl1c_suspend_compat,
+	.resume         = atl1c_resume_compat,
+#endif
 };
 
 /*
--- a/drivers/net/ethernet/atheros/atlx/atl1.c
+++ b/drivers/net/ethernet/atheros/atlx/atl1.c
@@ -2833,6 +2833,9 @@ static int atl1_resume(struct device *de
 	return 0;
 }
 
+compat_pci_suspend(atl1_suspend)
+compat_pci_resume(atl1_resume)
+
 static SIMPLE_DEV_PM_OPS(atl1_pm_ops, atl1_suspend, atl1_resume);
 #define ATL1_PM_OPS	(&atl1_pm_ops)
 
@@ -3102,7 +3105,12 @@ static struct pci_driver atl1_driver = {
 	.probe = atl1_probe,
 	.remove = __devexit_p(atl1_remove),
 	.shutdown = atl1_shutdown,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 	.driver.pm = ATL1_PM_OPS,
+#elif defined(CONFIG_PM_SLEEP)
+	.suspend        = atl1_suspend_compat,
+	.resume         = atl1_resume_compat,
+#endif
 };
 
 /*
--- a/drivers/net/wireless/ath/ath5k/pci.c
+++ b/drivers/net/wireless/ath/ath5k/pci.c
@@ -323,6 +323,9 @@ static int ath5k_pci_resume(struct devic
 	return 0;
 }
 
+compat_pci_suspend(ath5k_pci_suspend)
+compat_pci_resume(ath5k_pci_resume)
+
 static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume);
 #define ATH5K_PM_OPS	(&ath5k_pm_ops)
 #else
@@ -334,7 +337,12 @@ static struct pci_driver ath5k_pci_drive
 	.id_table	= ath5k_pci_id_table,
 	.probe		= ath5k_pci_probe,
 	.remove		= __devexit_p(ath5k_pci_remove),
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 	.driver.pm	= ATH5K_PM_OPS,
+#elif defined(CONFIG_PM_SLEEP)
+	.suspend        = ath5k_pci_suspend_compat,
+	.resume         = ath5k_pci_resume_compat,
+#endif
 };
 
 /*
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -353,14 +353,10 @@ static int ath_pci_resume(struct device
 	return 0;
 }
 
-static const struct dev_pm_ops ath9k_pm_ops = {
-	.suspend = ath_pci_suspend,
-	.resume = ath_pci_resume,
-	.freeze = ath_pci_suspend,
-	.thaw = ath_pci_resume,
-	.poweroff = ath_pci_suspend,
-	.restore = ath_pci_resume,
-};
+compat_pci_suspend(ath_pci_suspend)
+compat_pci_resume(ath_pci_resume)
+
+static SIMPLE_DEV_PM_OPS(ath9k_pm_ops, ath_pci_suspend, ath_pci_resume);
 
 #define ATH9K_PM_OPS	(&ath9k_pm_ops)
 
@@ -378,7 +374,12 @@ static struct pci_driver ath_pci_driver
 	.id_table   = ath_pci_id_table,
 	.probe      = ath_pci_probe,
 	.remove     = ath_pci_remove,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 	.driver.pm  = ATH9K_PM_OPS,
+#elif defined(CONFIG_PM)
+	.suspend    = ath_pci_suspend_compat,
+	.resume     = ath_pci_resume_compat,
+#endif
 };
 
 int ath_pci_init(void)
--- a/drivers/net/wireless/iwlwifi/iwl-pci.c
+++ b/drivers/net/wireless/iwlwifi/iwl-pci.c
@@ -520,6 +520,9 @@ static int iwl_pci_resume(struct device
 
 static SIMPLE_DEV_PM_OPS(iwl_dev_pm_ops, iwl_pci_suspend, iwl_pci_resume);
 
+compat_pci_suspend(iwl_pci_suspend)
+compat_pci_resume(iwl_pci_resume)
+
 #define IWL_PM_OPS	(&iwl_dev_pm_ops)
 
 #else
@@ -533,7 +536,12 @@ static struct pci_driver iwl_pci_driver
 	.id_table = iwl_hw_card_ids,
 	.probe = iwl_pci_probe,
 	.remove = __devexit_p(iwl_pci_remove),
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 	.driver.pm = IWL_PM_OPS,
+#elif defined(CONFIG_PM)
+	.suspend = iwl_pci_suspend_compat,
+	.resume = iwl_pci_resume_compat,
+#endif
 };
 
 int __must_check iwl_pci_register_driver(void)
--- a/drivers/net/wireless/libertas/if_spi.c
+++ b/drivers/net/wireless/libertas/if_spi.c
@@ -1252,6 +1252,7 @@ static int __devexit libertas_spi_remove
 	return 0;
 }
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 static int if_spi_suspend(struct device *dev)
 {
 	struct spi_device *spi = to_spi_device(dev);
@@ -1285,6 +1286,7 @@ static const struct dev_pm_ops if_spi_pm
 	.suspend	= if_spi_suspend,
 	.resume		= if_spi_resume,
 };
+#endif
 
 static struct spi_driver libertas_spi_driver = {
 	.probe	= if_spi_probe,
@@ -1293,7 +1295,9 @@ static struct spi_driver libertas_spi_dr
 		.name	= "libertas_spi",
 		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 		.pm	= &if_spi_pm_ops,
+#endif
 	},
 };
 
--- a/drivers/net/wireless/rtlwifi/rtl8192ce/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192ce/sw.c
@@ -381,21 +381,22 @@ MODULE_PARM_DESC(swlps, "Set to 1 to use
 MODULE_PARM_DESC(fwlps, "Set to 1 to use FW control power save (default 1)\n");
 MODULE_PARM_DESC(debug, "Set debug level (0-5) (default 0)");
 
-static const struct dev_pm_ops rtlwifi_pm_ops = {
-	.suspend = rtl_pci_suspend,
-	.resume = rtl_pci_resume,
-	.freeze = rtl_pci_suspend,
-	.thaw = rtl_pci_resume,
-	.poweroff = rtl_pci_suspend,
-	.restore = rtl_pci_resume,
-};
+static const SIMPLE_DEV_PM_OPS(rtlwifi_pm_ops, rtl_pci_suspend, rtl_pci_resume);
+
+compat_pci_suspend(rtl_pci_suspend)
+compat_pci_resume(rtl_pci_resume)
 
 static struct pci_driver rtl92ce_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = rtl92ce_pci_ids,
 	.probe = rtl_pci_probe,
 	.remove = rtl_pci_disconnect,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 	.driver.pm = &rtlwifi_pm_ops,
+#elif defined(CONFIG_PM)
+	.suspend    = rtl_pci_suspend_compat,
+	.resume     = rtl_pci_resume_compat,
+#endif
 };
 
 static int __init rtl92ce_module_init(void)
--- a/drivers/net/wireless/rtlwifi/rtl8192de/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192de/sw.c
@@ -391,21 +391,22 @@ MODULE_PARM_DESC(swlps, "Set to 1 to use
 MODULE_PARM_DESC(fwlps, "Set to 1 to use FW control power save (default 1)\n");
 MODULE_PARM_DESC(debug, "Set debug level (0-5) (default 0)");
 
-static const struct dev_pm_ops rtlwifi_pm_ops = {
-	.suspend = rtl_pci_suspend,
-	.resume = rtl_pci_resume,
-	.freeze = rtl_pci_suspend,
-	.thaw = rtl_pci_resume,
-	.poweroff = rtl_pci_suspend,
-	.restore = rtl_pci_resume,
-};
+static const SIMPLE_DEV_PM_OPS(rtlwifi_pm_ops, rtl_pci_suspend, rtl_pci_resume);
+
+compat_pci_suspend(rtl_pci_suspend)
+compat_pci_resume(rtl_pci_resume)
 
 static struct pci_driver rtl92de_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = rtl92de_pci_ids,
 	.probe = rtl_pci_probe,
 	.remove = rtl_pci_disconnect,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 	.driver.pm = &rtlwifi_pm_ops,
+#elif defined(CONFIG_PM)
+	.suspend    = rtl_pci_suspend_compat,
+	.resume     = rtl_pci_resume_compat,
+#endif
 };
 
 /* add global spin lock to solve the problem that
--- a/drivers/net/wireless/rtlwifi/rtl8192se/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192se/sw.c
@@ -403,21 +403,22 @@ MODULE_PARM_DESC(swlps, "Set to 1 to use
 MODULE_PARM_DESC(fwlps, "Set to 1 to use FW control power save (default 1)\n");
 MODULE_PARM_DESC(debug, "Set debug level (0-5) (default 0)");
 
-static const struct dev_pm_ops rtlwifi_pm_ops = {
-	.suspend = rtl_pci_suspend,
-	.resume = rtl_pci_resume,
-	.freeze = rtl_pci_suspend,
-	.thaw = rtl_pci_resume,
-	.poweroff = rtl_pci_suspend,
-	.restore = rtl_pci_resume,
-};
+static const SIMPLE_DEV_PM_OPS(rtlwifi_pm_ops, rtl_pci_suspend, rtl_pci_resume);
+
+compat_pci_suspend(rtl_pci_suspend)
+compat_pci_resume(rtl_pci_resume)
 
 static struct pci_driver rtl92se_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = rtl92se_pci_ids,
 	.probe = rtl_pci_probe,
 	.remove = rtl_pci_disconnect,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
 	.driver.pm = &rtlwifi_pm_ops,
+#elif defined(CONFIG_PM)
+	.suspend    = rtl_pci_suspend_compat,
+	.resume     = rtl_pci_resume_compat,
+#endif
 };
 
 static int __init rtl92se_module_init(void)