PCI: export pci_restore_msi_state()

PCI error recovery usually involves the PCI adapter being reset.
If the device is using MSI, the reset will cause the MSI state
to be lost; the device driver needs to restore the MSI state.

The pci_restore_msi_state() routine is currently protected
by CONFIG_PM; remove this, and also export the symbol, so
that it can be used in a modle.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 3 insertions, 8 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 07c9f09c856d..30de51fcd68c 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -230,7 +230,6 @@ static void pci_intx_for_msi(struct pci_dev *dev, int enable)
                 pci_intx(dev, enable);
 }
 
-#ifdef CONFIG_PM
 static void __pci_restore_msi_state(struct pci_dev *dev)
 {
         int pos;
@@ -288,7 +287,7 @@ void pci_restore_msi_state(struct pci_dev *dev)
         __pci_restore_msi_state(dev);
         __pci_restore_msix_state(dev);
 }
-#endif  /* CONFIG_PM */
+EXPORT_SYMBOL_GPL(pci_restore_msi_state);
 
 /**
  * msi_capability_init - configure device's MSI capability structure
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index fc87e14b50de..4c4613387786 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -45,12 +45,6 @@ static inline void pci_no_msi(void) { }
 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 #endif
 
-#if defined(CONFIG_PCI_MSI) && defined(CONFIG_PM)
-void pci_restore_msi_state(struct pci_dev *dev);
-#else
-static inline void pci_restore_msi_state(struct pci_dev *dev) {}
-#endif
-
 #ifdef CONFIG_PCIEAER
 void pci_no_aer(void);
 #else
diff --git a/include/linux/pci.h b/include/linux/pci.h
index c53d6cf723d1..87aab07e239a 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -668,6 +668,7 @@ static inline int pci_enable_msix(struct pci_dev* dev,
         struct msix_entry *entries, int nvec) {return -1;}
 static inline void pci_disable_msix(struct pci_dev *dev) {}
 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
+static inline void pci_restore_msi_state(struct pci_dev *dev) {}
 #else
 extern int pci_enable_msi(struct pci_dev *dev);
 extern void pci_disable_msi(struct pci_dev *dev);
@@ -675,6 +676,7 @@ extern int pci_enable_msix(struct pci_dev* dev,
         struct msix_entry *entries, int nvec);
 extern void pci_disable_msix(struct pci_dev *dev);
 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
+extern void pci_restore_msi_state(struct pci_dev *dev);
 #endif
 
 #ifdef CONFIG_HT_IRQ