pcnet32: add suspend and resume capability

Add suspend and resume capability to the driver.
Tested both to ram and to disk on x86_64 platform.

Signed-off-by:  Don Fry <pcnet32@verizon.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/pcnet32.c b/drivers/net/pcnet32.c
index a997349..db87429 100644 (file)
--- a/drivers/net/pcnet32.c
+++ b/drivers/net/pcnet32.c
@@ -23,11 +23,11 @@
 
 #define DRV_NAME       "pcnet32"
 #ifdef CONFIG_PCNET32_NAPI
-#define DRV_VERSION    "1.33-NAPI"
+#define DRV_VERSION    "1.34-NAPI"
 #else
-#define DRV_VERSION    "1.33"
+#define DRV_VERSION    "1.34"
 #endif
-#define DRV_RELDATE    "27.Jun.2006"
+#define DRV_RELDATE    "14.Aug.2007"
 #define PFX            DRV_NAME ": "
 
 static const char *const version =
@@ -2955,6 +2955,33 @@ static void pcnet32_watchdog(struct net_device *dev)
        mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
 }
 
+static int pcnet32_pm_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+       struct net_device *dev = pci_get_drvdata(pdev);
+
+       if (netif_running(dev)) {
+               netif_device_detach(dev);
+               pcnet32_close(dev);
+       }
+       pci_save_state(pdev);
+       pci_set_power_state(pdev, pci_choose_state(pdev, state));
+       return 0;
+}
+
+static int pcnet32_pm_resume(struct pci_dev *pdev)
+{
+       struct net_device *dev = pci_get_drvdata(pdev);
+
+       pci_set_power_state(pdev, PCI_D0);
+       pci_restore_state(pdev);
+
+       if (netif_running(dev)) {
+               pcnet32_open(dev);
+               netif_device_attach(dev);
+       }
+       return 0;
+}
+
 static void __devexit pcnet32_remove_one(struct pci_dev *pdev)
 {
        struct net_device *dev = pci_get_drvdata(pdev);
@@ -2978,6 +3005,8 @@ static struct pci_driver pcnet32_driver = {
        .probe = pcnet32_probe_pci,
        .remove = __devexit_p(pcnet32_remove_one),
        .id_table = pcnet32_pci_tbl,
+       .suspend = pcnet32_pm_suspend,
+       .resume = pcnet32_pm_resume,
 };
 
 /* An additional parameter that may be passed in... */