bnx2x: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

The driver was also calling bnx2x_set_power_state() to set the power state
of the device by changing the device's registers' value. It is no more
needed.

Compile-tested only.
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Acked-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

@@ -4988,8 +4988,9 @@ void bnx2x_tx_timeout(struct net_device *dev, unsigned int txqueue)
 	bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_TX_TIMEOUT, 0);
 }
 
-int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused bnx2x_suspend(struct device *dev_d)
 {
+	struct pci_dev *pdev = to_pci_dev(dev_d);
 	struct net_device *dev = pci_get_drvdata(pdev);
 	struct bnx2x *bp;
 
@@ -5001,8 +5002,6 @@ int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
 
 	rtnl_lock();
 
-	pci_save_state(pdev);
-
 	if (!netif_running(dev)) {
 		rtnl_unlock();
 		return 0;
@@ -5012,15 +5011,14 @@ int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
 
 	bnx2x_nic_unload(bp, UNLOAD_CLOSE, false);
 
-	bnx2x_set_power_state(bp, pci_choose_state(pdev, state));
-
 	rtnl_unlock();
 
 	return 0;
 }
 
-int bnx2x_resume(struct pci_dev *pdev)
+static int __maybe_unused bnx2x_resume(struct device *dev_d)
 {
+	struct pci_dev *pdev = to_pci_dev(dev_d);
 	struct net_device *dev = pci_get_drvdata(pdev);
 	struct bnx2x *bp;
 	int rc;
@@ -5038,14 +5036,11 @@ int bnx2x_resume(struct pci_dev *pdev)
 
 	rtnl_lock();
 
-	pci_restore_state(pdev);
-
 	if (!netif_running(dev)) {
 		rtnl_unlock();
 		return 0;
 	}
 
-	bnx2x_set_power_state(bp, PCI_D0);
 	netif_device_attach(dev);
 
 	rc = bnx2x_nic_load(bp, LOAD_OPEN);
@@ -5055,6 +5050,8 @@ int bnx2x_resume(struct pci_dev *pdev)
 	return rc;
 }
 
+SIMPLE_DEV_PM_OPS(bnx2x_pm_ops, bnx2x_suspend, bnx2x_resume);
+
 void bnx2x_set_ctx_validation(struct bnx2x *bp, struct eth_context *cxt,
 			      u32 cid)
 {

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h

@@ -541,9 +541,7 @@ int bnx2x_change_mac_addr(struct net_device *dev, void *p);
 /* NAPI poll Tx part */
 int bnx2x_tx_int(struct bnx2x *bp, struct bnx2x_fp_txdata *txdata);
 
-/* suspend/resume callbacks */
-int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state);
-int bnx2x_resume(struct pci_dev *pdev);
+extern const struct dev_pm_ops bnx2x_pm_ops;
 
 /* Release IRQ vectors */
 void bnx2x_free_irq(struct bnx2x *bp);

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -14462,8 +14462,7 @@ static struct pci_driver bnx2x_pci_driver = {
 	.id_table    = bnx2x_pci_tbl,
 	.probe       = bnx2x_init_one,
 	.remove      = bnx2x_remove_one,
-	.suspend     = bnx2x_suspend,
-	.resume      = bnx2x_resume,
+	.driver.pm   = &bnx2x_pm_ops,
 	.err_handler = &bnx2x_err_handler,
 #ifdef CONFIG_BNX2X_SRIOV
 	.sriov_configure = bnx2x_sriov_configure,