ieee1394: ohci1394: suspend/resume cosmetics

Reorder the definitions of ohci1394_pci_suspend and _resume.  Remove
redundant comments.  Beautify return statements.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 48 insertions, 78 deletions

diff --git a/drivers/ieee1394/ohci1394.c b/drivers/ieee1394/ohci1394.c
index b98b9934b92d..a12802553b4b 100644
--- a/drivers/ieee1394/ohci1394.c
+++ b/drivers/ieee1394/ohci1394.c
@@ -3529,108 +3529,40 @@ static void ohci1394_pci_remove(struct pci_dev *pdev)
 }
 
 #ifdef CONFIG_PM
-static int ohci1394_pci_resume (struct pci_dev *pdev)
+static int ohci1394_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 {
         int err;
-        struct ti_ohci *ohci;
-
-/* PowerMac resume code comes first */
-#ifdef CONFIG_PPC_PMAC
-        if (machine_is(powermac)) {
-                struct device_node *of_node;
-
-                /* Re-enable 1394 */
-                of_node = pci_device_to_OF_node (pdev);
-                if (of_node)
-                        pmac_call_feature (PMAC_FTR_1394_ENABLE, of_node, 0, 1);
-        }
-#endif /* CONFIG_PPC_PMAC */
-
-        pci_set_power_state(pdev, PCI_D0);
-        pci_restore_state(pdev);
-        err = pci_enable_device(pdev);
-        if (err)
-                return err;
-
-        ohci = pci_get_drvdata(pdev);
-        if (!ohci)
-                return -1; /* or which exit status to use? */
-
-        PRINT(KERN_DEBUG, "resume called");
-
-        /* The following lines are copied from ohci1394_pci_probe(): */
-
-        /* Start off with a soft reset, to clear everything to a sane
-         * state. */
-        ohci_soft_reset(ohci);
-
-        /* Now enable LPS, which we need in order to start accessing
-         * most of the registers.  In fact, on some cards (ALI M5251),
-         * accessing registers in the SClk domain without LPS enabled
-         * will lock up the machine.  Wait 50msec to make sure we have
-         * full link enabled.  */
-        reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_LPS);
-
-        /* Disable and clear interrupts */
-        reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff);
-        reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff);
-
-        mdelay(50);
-
-        ohci_initialize(ohci);
-
-        return 0;
-}
-
-static int ohci1394_pci_suspend (struct pci_dev *pdev, pm_message_t state)
-{
-        int err;
-        struct ti_ohci *ohci;
-
-        ohci = pci_get_drvdata(pdev);
-        if (!ohci)
-                return -1; /* Not sure if this is the correct return code */
+        struct ti_ohci *ohci = pci_get_drvdata(pdev);
 
         PRINT(KERN_DEBUG, "suspend called");
+        if (!ohci)
+                return -ENXIO;
 
-        /* clear the async DMA contexts and stop using the controller: */
+        /* Clear the async DMA contexts and stop using the controller */
         hpsb_bus_reset(ohci->host);
 
-        /* The following calls are from ohci1394_pci_remove(): */
-
-        /* Clear out BUS Options */
+        /* See ohci1394_pci_remove() for comments on this sequence */
         reg_write(ohci, OHCI1394_ConfigROMhdr, 0);
         reg_write(ohci, OHCI1394_BusOptions,
                   (reg_read(ohci, OHCI1394_BusOptions) & 0x0000f007) |
                   0x00ff0000);
-
-        /* Clear interrupt registers */
         reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff);
         reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff);
         reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 0xffffffff);
         reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 0xffffffff);
         reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 0xffffffff);
         reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 0xffffffff);
-
-        /* Disable IRM Contender */
         set_phy_reg(ohci, 4, ~0xc0 & get_phy_reg(ohci, 4));
-
-        /* Clear link control register */
         reg_write(ohci, OHCI1394_LinkControlClear, 0xffffffff);
-
-        /* Let all other nodes know to ignore us */
         ohci_devctl(ohci->host, RESET_BUS, LONG_RESET_NO_FORCE_ROOT);
-
-        /* This stops all DMA contexts, disables interrupts,
-         * and clears linkEnable and LPS: */
         ohci_soft_reset(ohci);
 
         err = pci_save_state(pdev);
         if (err)
-                goto out;
+                return err;
         err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
         if (err)
-                goto out;
+                return err;
 
 /* PowerMac suspend code comes last */
 #ifdef CONFIG_PPC_PMAC
@@ -3643,8 +3575,46 @@ static int ohci1394_pci_suspend (struct pci_dev *pdev, pm_message_t state)
                         pmac_call_feature(PMAC_FTR_1394_ENABLE, of_node, 0, 0);
         }
 #endif /* CONFIG_PPC_PMAC */
-out:
-        return err;
+
+        return 0;
+}
+
+static int ohci1394_pci_resume(struct pci_dev *pdev)
+{
+        int err;
+        struct ti_ohci *ohci = pci_get_drvdata(pdev);
+
+        PRINT(KERN_DEBUG, "resume called");
+        if (!ohci)
+                return -ENXIO;
+
+/* PowerMac resume code comes first */
+#ifdef CONFIG_PPC_PMAC
+        if (machine_is(powermac)) {
+                struct device_node *of_node;
+
+                /* Re-enable 1394 */
+                of_node = pci_device_to_OF_node (pdev);
+                if (of_node)
+                        pmac_call_feature (PMAC_FTR_1394_ENABLE, of_node, 0, 1);
+        }
+#endif /* CONFIG_PPC_PMAC */
+
+        pci_set_power_state(pdev, PCI_D0);
+        pci_restore_state(pdev);
+        err = pci_enable_device(pdev);
+        if (err)
+                return err;
+
+        /* See ohci1394_pci_probe() for comments on this sequence */
+        ohci_soft_reset(ohci);
+        reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_LPS);
+        reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff);
+        reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff);
+        mdelay(50);
+        ohci_initialize(ohci);
+
+        return 0;
 }
 #endif /* CONFIG_PM */