PCI: Fix typos

Fix typos.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/ats.c

@@ -455,8 +455,8 @@ void pci_restore_pasid_state(struct pci_dev *pdev)
  * pci_pasid_features - Check which PASID features are supported
  * @pdev: PCI device structure
  *
- * Returns a negative value when no PASI capability is present.
- * Otherwise is returns a bitmask with supported features. Current
+ * Return a negative value when no PASID capability is present.
+ * Otherwise return a bitmask with supported features. Current
  * features reported are:
  * PCI_PASID_CAP_EXEC - Execute permission supported
  * PCI_PASID_CAP_PRIV - Privileged mode supported

drivers/pci/controller/cadence/Kconfig

@@ -38,7 +38,7 @@ config PCIE_CADENCE_PLAT_EP
 	select PCIE_CADENCE_EP
 	select PCIE_CADENCE_PLAT
 	help
-	  Say Y here if you want to support the Cadence PCIe  platform controller in
+	  Say Y here if you want to support the Cadence PCIe platform controller in
 	  endpoint mode. This PCIe controller may be embedded into many
 	  different vendors SoCs.
 

drivers/pci/hotplug/cpqphp_core.c

@@ -328,7 +328,7 @@ get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
 		} else {
 			/* Did not get a match on the target PCI device. Check
 			 * if the current IRQ table entry is a PCI-to-PCI
-			 * bridge device.  If so, and it's secondary bus
+			 * bridge device.  If so, and its secondary bus
 			 * matches the bus number for the target device, I need
 			 * to save the bridge's slot number.  If I can not find
 			 * an entry for the target device, I will have to

drivers/pci/hotplug/s390_pci_hpc.c

@@ -112,7 +112,7 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 
 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 {
-	/* if the slot exits it always contains a function */
+	/* if the slot exists it always contains a function */
 	*value = 1;
 	return 0;
 }

drivers/pci/iomap.c

@@ -156,7 +156,7 @@ EXPORT_SYMBOL_GPL(pci_iomap_wc);
  * the different IOMAP ranges.
  *
  * But if the architecture does not use the generic iomap code, and if
- * it has _not_ defined it's own private pci_iounmap function, we define
+ * it has _not_ defined its own private pci_iounmap function, we define
  * it here.
  *
  * NOTE! This default implementation assumes that if the architecture