Pull sony into release branch

[powerpc.git] / drivers / pci / pci.c

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 1bb8799..03fd59e 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -406,6 +406,13 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
        if ((state == PCI_D1 || state == PCI_D2) && pci_no_d1d2(dev))
                return 0;
 
+       /* find PCI PM capability in list */
+       pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+
+       /* abort if the device doesn't support PM capabilities */
+       if (!pm)
+               return -EIO;
+
        /* Validate current state:
         * Can enter D0 from any state, but if we can only go deeper 
         * to sleep if we're already in a low power state
@@ -418,13 +425,6 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
                return 0;        /* we're already there */
 
 
-       /* find PCI PM capability in list */
-       pm = pci_find_capability(dev, PCI_CAP_ID_PM);
-       
-       /* abort if the device doesn't support PM capabilities */
-       if (!pm)
-               return -EIO; 
-
        pci_read_config_word(dev,pm + PCI_PM_PMC,&pmc);
        if ((pmc & PCI_PM_CAP_VER_MASK) > 3) {
                printk(KERN_DEBUG
@@ -1186,6 +1186,11 @@ int pci_set_mwi(struct pci_dev *dev)
        return 0;
 }
 
+int pci_try_set_mwi(struct pci_dev *dev)
+{
+       return 0;
+}
+
 void pci_clear_mwi(struct pci_dev *dev)
 {
 }
@@ -1242,9 +1247,7 @@ pci_set_cacheline_size(struct pci_dev *dev)
  * pci_set_mwi - enables memory-write-invalidate PCI transaction
  * @dev: the PCI device for which MWI is enabled
  *
- * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND,
- * and then calls @pcibios_set_mwi to do the needed arch specific
- * operations or a generic mwi-prep function.
+ * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND.
  *
  * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
  */
@@ -1260,7 +1263,8 @@ pci_set_mwi(struct pci_dev *dev)
 
        pci_read_config_word(dev, PCI_COMMAND, &cmd);
        if (! (cmd & PCI_COMMAND_INVALIDATE)) {
-               pr_debug("PCI: Enabling Mem-Wr-Inval for device %s\n", pci_name(dev));
+               pr_debug("PCI: Enabling Mem-Wr-Inval for device %s\n",
+                       pci_name(dev));
                cmd |= PCI_COMMAND_INVALIDATE;
                pci_write_config_word(dev, PCI_COMMAND, cmd);
        }
@@ -1268,6 +1272,21 @@ pci_set_mwi(struct pci_dev *dev)
        return 0;
 }
 
+/**
+ * pci_try_set_mwi - enables memory-write-invalidate PCI transaction
+ * @dev: the PCI device for which MWI is enabled
+ *
+ * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND.
+ * Callers are not required to check the return value.
+ *
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+int pci_try_set_mwi(struct pci_dev *dev)
+{
+       int rc = pci_set_mwi(dev);
+       return rc;
+}
+
 /**
  * pci_clear_mwi - disables Memory-Write-Invalidate for device dev
  * @dev: the PCI device to disable
@@ -1383,7 +1402,7 @@ pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
  */
 int pcix_get_max_mmrbc(struct pci_dev *dev)
 {
-       int ret, err, cap;
+       int err, cap;
        u32 stat;
 
        cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
@@ -1394,9 +1413,7 @@ int pcix_get_max_mmrbc(struct pci_dev *dev)
        if (err)
                return -EINVAL;
 
-       ret = (stat & PCI_X_STATUS_MAX_READ) >> 12;
-
-       return ret;
+       return (stat & PCI_X_STATUS_MAX_READ) >> 12;
 }
 EXPORT_SYMBOL(pcix_get_max_mmrbc);
 
@@ -1602,6 +1619,7 @@ EXPORT_SYMBOL(pci_release_selected_regions);
 EXPORT_SYMBOL(pci_request_selected_regions);
 EXPORT_SYMBOL(pci_set_master);
 EXPORT_SYMBOL(pci_set_mwi);
+EXPORT_SYMBOL(pci_try_set_mwi);
 EXPORT_SYMBOL(pci_clear_mwi);
 EXPORT_SYMBOL_GPL(pci_intx);
 EXPORT_SYMBOL(pci_set_dma_mask);