1 files changed, 28 insertions, 8 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index f3fd55df67db..6e309c8b47df 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -970,6 +970,32 @@ void pcim_pin_device(struct pci_dev *pdev)
  */
 void __attribute__ ((weak)) pcibios_disable_device (struct pci_dev *dev) {}
 
+static void do_pci_disable_device(struct pci_dev *dev)
+{
+        u16 pci_command;
+
+        pci_read_config_word(dev, PCI_COMMAND, &pci_command);
+        if (pci_command & PCI_COMMAND_MASTER) {
+                pci_command &= ~PCI_COMMAND_MASTER;
+                pci_write_config_word(dev, PCI_COMMAND, pci_command);
+        }
+
+        pcibios_disable_device(dev);
+}
+
+/**
+ * pci_disable_enabled_device - Disable device without updating enable_cnt
+ * @dev: PCI device to disable
+ *
+ * NOTE: This function is a backend of PCI power management routines and is
+ * not supposed to be called drivers.
+ */
+void pci_disable_enabled_device(struct pci_dev *dev)
+{
+        if (atomic_read(&dev->enable_cnt))
+                do_pci_disable_device(dev);
+}
+
 /**
  * pci_disable_device - Disable PCI device after use
  * @dev: PCI device to be disabled
@@ -984,7 +1010,6 @@ void
 pci_disable_device(struct pci_dev *dev)
 {
         struct pci_devres *dr;
-        u16 pci_command;
 
         dr = find_pci_dr(dev);
         if (dr)
@@ -993,14 +1018,9 @@ pci_disable_device(struct pci_dev *dev)
         if (atomic_sub_return(1, &dev->enable_cnt) != 0)
                 return;
 
-        pci_read_config_word(dev, PCI_COMMAND, &pci_command);
-        if (pci_command & PCI_COMMAND_MASTER) {
-                pci_command &= ~PCI_COMMAND_MASTER;
-                pci_write_config_word(dev, PCI_COMMAND, pci_command);
-        }
-        dev->is_busmaster = 0;
+        do_pci_disable_device(dev);
 
-        pcibios_disable_device(dev);
+        dev->is_busmaster = 0;
 }
 
 /**