myri10ge: no need to save MSI and PCIe state in the driver

The PCI MSI and express state are already saved and restored by the
current versions of pci_save_state/pci_restore_state.
Therefore it is no longer necessary for the driver to do it.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 9 insertions, 38 deletions

diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 1ce3c9e5c89..9bc5dab949f 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -199,8 +199,6 @@ struct myri10ge_priv {
         unsigned long serial_number;
         int vendor_specific_offset;
         int fw_multicast_support;
-        u32 devctl;
-        u16 msi_flags;
         u32 read_dma;
         u32 write_dma;
         u32 read_write_dma;
@@ -2520,34 +2518,6 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
         }
 }
 
-static void myri10ge_save_state(struct myri10ge_priv *mgp)
-{
-        struct pci_dev *pdev = mgp->pdev;
-        int cap;
-
-        pci_save_state(pdev);
-        /* now save PCIe and MSI state that Linux will not
-         * save for us */
-        cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
-        pci_read_config_dword(pdev, cap + PCI_EXP_DEVCTL, &mgp->devctl);
-        cap = pci_find_capability(pdev, PCI_CAP_ID_MSI);
-        pci_read_config_word(pdev, cap + PCI_MSI_FLAGS, &mgp->msi_flags);
-}
-
-static void myri10ge_restore_state(struct myri10ge_priv *mgp)
-{
-        struct pci_dev *pdev = mgp->pdev;
-        int cap;
-
-        /* restore PCIe and MSI state that linux will not */
-        cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
-        pci_write_config_dword(pdev, cap + PCI_CAP_ID_EXP, mgp->devctl);
-        cap = pci_find_capability(pdev, PCI_CAP_ID_MSI);
-        pci_write_config_word(pdev, cap + PCI_MSI_FLAGS, mgp->msi_flags);
-
-        pci_restore_state(pdev);
-}
-
 #ifdef CONFIG_PM
 
 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
@@ -2568,7 +2538,7 @@ static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
                 rtnl_unlock();
         }
         myri10ge_dummy_rdma(mgp, 0);
-        myri10ge_save_state(mgp);
+        pci_save_state(pdev);
         pci_disable_device(pdev);
         pci_set_power_state(pdev, pci_choose_state(pdev, state));
         return 0;
@@ -2593,7 +2563,8 @@ static int myri10ge_resume(struct pci_dev *pdev)
                        mgp->dev->name);
                 return -EIO;
         }
-        myri10ge_restore_state(mgp);
+
+        pci_restore_state(pdev);
 
         status = pci_enable_device(pdev);
         if (status < 0) {
@@ -2608,7 +2579,7 @@ static int myri10ge_resume(struct pci_dev *pdev)
 
         /* Save configuration space to be restored if the
          * nic resets due to a parity error */
-        myri10ge_save_state(mgp);
+        pci_save_state(pdev);
 
         if (netif_running(netdev)) {
                 rtnl_lock();
@@ -2674,10 +2645,10 @@ static void myri10ge_watchdog(struct work_struct *work)
                  * when the driver was loaded, or the last time the
                  * nic was resumed from power saving mode.
                  */
-                myri10ge_restore_state(mgp);
+                pci_restore_state(mgp->pdev);
 
                 /* save state again for accounting reasons */
-                myri10ge_save_state(mgp);
+                pci_save_state(mgp->pdev);
 
         } else {
                 /* if we get back -1's from our slot, perhaps somebody
@@ -2917,7 +2888,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
         /* Save configuration space to be restored if the
          * nic resets due to a parity error */
-        myri10ge_save_state(mgp);
+        pci_save_state(pdev);
 
         /* Setup the watchdog timer */
         setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
@@ -2937,7 +2908,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         return 0;
 
 abort_with_state:
-        myri10ge_restore_state(mgp);
+        pci_restore_state(pdev);
 
 abort_with_firmware:
         myri10ge_dummy_rdma(mgp, 0);
@@ -2992,7 +2963,7 @@ static void myri10ge_remove(struct pci_dev *pdev)
         myri10ge_dummy_rdma(mgp, 0);
 
         /* avoid a memory leak */
-        myri10ge_restore_state(mgp);
+        pci_restore_state(pdev);
 
         bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
         dma_free_coherent(&pdev->dev, bytes,