PCI: make pci_restore_state return void

pci_restore_state only ever returns 0, thus there is no benefit in
having it return any value.  Also, a large majority of the callers do
not check the return code of pci_restore_state.  Make the
pci_restore_state a void return and avoid the overhead.

Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

13 files changed, 22 insertions, 66 deletions

diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c
index 0dfff50891e4..737bb877e962 100644
--- a/drivers/media/video/cafe_ccic.c
+++ b/drivers/media/video/cafe_ccic.c
@@ -2186,9 +2186,7 @@ static int cafe_pci_resume(struct pci_dev *pdev)
         struct cafe_camera *cam = to_cam(v4l2_dev);
         int ret = 0;
 
-        ret = pci_restore_state(pdev);
-        if (ret)
-                return ret;
+        pci_restore_state(pdev);
         ret = pci_enable_device(pdev);
 
         if (ret) {
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 8524cc40ec57..d3c4a374a92e 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -3403,9 +3403,7 @@ static int myri10ge_resume(struct pci_dev *pdev)
                 return -EIO;
         }
 
-        status = pci_restore_state(pdev);
-        if (status)
-                return status;
+        pci_restore_state(pdev);
 
         status = pci_enable_device(pdev);
         if (status) {
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 267019bb2b15..1763b9a7fd8e 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1066,22 +1066,9 @@ static int falcon_reset_hw(struct efx_nic *efx, enum reset_type method)
 
         /* Restore PCI configuration if needed */
         if (method == RESET_TYPE_WORLD) {
-                if (efx_nic_is_dual_func(efx)) {
-                        rc = pci_restore_state(nic_data->pci_dev2);
-                        if (rc) {
-                                netif_err(efx, drv, efx->net_dev,
-                                          "failed to restore PCI config for "
-                                          "the secondary function\n");
-                                goto fail3;
-                        }
-                }
-                rc = pci_restore_state(efx->pci_dev);
-                if (rc) {
-                        netif_err(efx, drv, efx->net_dev,
-                                  "failed to restore PCI config for the "
-                                  "primary function\n");
-                        goto fail4;
-                }
+                if (efx_nic_is_dual_func(efx))
+                        pci_restore_state(nic_data->pci_dev2);
+                pci_restore_state(efx->pci_dev);
                 netif_dbg(efx, drv, efx->net_dev,
                           "successfully restored PCI config\n");
         }
@@ -1092,7 +1079,7 @@ static int falcon_reset_hw(struct efx_nic *efx, enum reset_type method)
                 rc = -ETIMEDOUT;
                 netif_err(efx, hw, efx->net_dev,
                           "timed out waiting for hardware reset\n");
-                goto fail5;
+                goto fail3;
         }
         netif_dbg(efx, hw, efx->net_dev, "hardware reset complete\n");
 
@@ -1100,11 +1087,9 @@ static int falcon_reset_hw(struct efx_nic *efx, enum reset_type method)
 
         /* pci_save_state() and pci_restore_state() MUST be called in pairs */
 fail2:
-fail3:
         pci_restore_state(efx->pci_dev);
 fail1:
-fail4:
-fail5:
+fail3:
         return rc;
 }
 
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 220e0398f1d5..61553af38e65 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -4087,9 +4087,7 @@ static int skge_resume(struct pci_dev *pdev)
         if (err)
                 goto out;
 
-        err = pci_restore_state(pdev);
-        if (err)
-                goto out;
+        pci_restore_state(pdev);
 
         err = skge_reset(hw);
         if (err)
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index d6577084ce70..be3aee782760 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -4969,10 +4969,7 @@ static int sky2_resume(struct pci_dev *pdev)
         if (err)
                 goto out;
 
-        err = pci_restore_state(pdev);
-        if (err)
-                goto out;
-
+        pci_restore_state(pdev);
         pci_enable_wake(pdev, PCI_D0, 0);
 
         /* Re-enable all clocks */
diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c
index 2449d785cf8d..4fd4c33de6ae 100644
--- a/drivers/net/wireless/rt2x00/rt2x00pci.c
+++ b/drivers/net/wireless/rt2x00/rt2x00pci.c
@@ -356,12 +356,12 @@ int rt2x00pci_resume(struct pci_dev *pci_dev)
         struct rt2x00_dev *rt2x00dev = hw->priv;
 
         if (pci_set_power_state(pci_dev, PCI_D0) ||
-            pci_enable_device(pci_dev) ||
-            pci_restore_state(pci_dev)) {
+            pci_enable_device(pci_dev)) {
                 ERROR(rt2x00dev, "Failed to resume device.\n");
                 return -EIO;
         }
 
+        pci_restore_state(pci_dev);
         return rt2x00lib_resume(rt2x00dev);
 }
 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 8a6f797de8e5..80e551ee640b 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -449,7 +449,8 @@ static int pci_restore_standard_config(struct pci_dev *pci_dev)
                         return error;
         }
 
-        return pci_restore_state(pci_dev);
+        pci_restore_state(pci_dev);
+        return 0;
 }
 
 static void pci_pm_default_resume_early(struct pci_dev *pci_dev)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 710c8a29be0d..6762dcae90ab 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -937,14 +937,13 @@ pci_save_state(struct pci_dev *dev)
  * pci_restore_state - Restore the saved state of a PCI device
  * @dev: - PCI device that we're dealing with
  */
-int 
-pci_restore_state(struct pci_dev *dev)
+void pci_restore_state(struct pci_dev *dev)
 {
         int i;
         u32 val;
 
         if (!dev->state_saved)
-                return 0;
+                return;
 
         /* PCI Express register must be restored first */
         pci_restore_pcie_state(dev);
@@ -968,8 +967,6 @@ pci_restore_state(struct pci_dev *dev)
         pci_restore_iov_state(dev);
 
         dev->state_saved = false;
-
-        return 0;
 }
 
 static int do_pci_enable_device(struct pci_dev *dev, int bars)
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 5bbaee597e88..524d586c3147 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -7487,16 +7487,10 @@ static int ipr_reset_restore_cfg_space(struct ipr_cmnd *ipr_cmd)
 {
         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
         volatile u32 int_reg;
-        int rc;
 
         ENTER;
         ioa_cfg->pdev->state_saved = true;
-        rc = pci_restore_state(ioa_cfg->pdev);
-
-        if (rc != PCIBIOS_SUCCESSFUL) {
-                ipr_cmd->s.ioasa.hdr.ioasc = cpu_to_be32(IPR_IOASC_PCI_ACCESS_ERROR);
-                return IPR_RC_JOB_CONTINUE;
-        }
+        pci_restore_state(ioa_cfg->pdev);
 
         if (ipr_set_pcix_cmd_reg(ioa_cfg)) {
                 ipr_cmd->s.ioasa.hdr.ioasc = cpu_to_be32(IPR_IOASC_PCI_ACCESS_ERROR);
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index 300d59f389da..321cf3ae8630 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -2228,12 +2228,7 @@ static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
                 /* Once either bist or pci reset is done, restore PCI config
                  * space. If this fails, proceed with hard reset again
                  */
-                if (pci_restore_state(pinstance->pdev)) {
-                        pmcraid_info("config-space error resetting again\n");
-                        pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
-                        pmcraid_reset_alert(cmd);
-                        break;
-                }
+                pci_restore_state(pinstance->pdev);
 
                 /* fail all pending commands */
                 pmcraid_fail_outstanding_cmds(pinstance);
diff --git a/drivers/staging/sm7xx/smtcfb.c b/drivers/staging/sm7xx/smtcfb.c
index 24f47d6388f4..7162dee3b0d8 100644
--- a/drivers/staging/sm7xx/smtcfb.c
+++ b/drivers/staging/sm7xx/smtcfb.c
@@ -1071,7 +1071,7 @@ static int __maybe_unused smtcfb_resume(struct pci_dev *pdev)
         /* when resuming, restore pci data and fb cursor */
         if (pdev->dev.power.power_state.event != PM_EVENT_FREEZE) {
                 retv = pci_set_power_state(pdev, PCI_D0);
-                retv = pci_restore_state(pdev);
+                pci_restore_state(pdev);
                 if (pci_enable_device(pdev))
                         return -1;
                 pci_set_master(pdev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 7454408c41b6..63cbadce337e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -806,7 +806,7 @@ size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
 
 /* Power management related routines */
 int pci_save_state(struct pci_dev *dev);
-int pci_restore_state(struct pci_dev *dev);
+void pci_restore_state(struct pci_dev *dev);
 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
@@ -1168,10 +1168,8 @@ static inline int pci_save_state(struct pci_dev *dev)
         return 0;
 }
 
-static inline int pci_restore_state(struct pci_dev *dev)
-{
-        return 0;
-}
+static inline void pci_restore_state(struct pci_dev *dev)
+{ }
 
 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 {
diff --git a/sound/pci/cs5535audio/cs5535audio_pm.c b/sound/pci/cs5535audio/cs5535audio_pm.c
index a3301cc4ab82..185b00088320 100644
--- a/sound/pci/cs5535audio/cs5535audio_pm.c
+++ b/sound/pci/cs5535audio/cs5535audio_pm.c
@@ -90,12 +90,7 @@ int snd_cs5535audio_resume(struct pci_dev *pci)
         int i;
 
         pci_set_power_state(pci, PCI_D0);
-        if (pci_restore_state(pci) < 0) {
-                printk(KERN_ERR "cs5535audio: pci_restore_state failed, "
-                       "disabling device\n");
-                snd_card_disconnect(card);
-                return -EIO;
-        }
+        pci_restore_state(pci);
         if (pci_enable_device(pci) < 0) {
                 printk(KERN_ERR "cs5535audio: pci_enable_device failed, "
                        "disabling device\n");