Commit 94688cf2 authored by Linas Vepstas's avatar Linas Vepstas Committed by Greg Kroah-Hartman
Browse files

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: default avatarLinas Vepstas <linas@austin.ibm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 1b7c9fca

drivers/pci/msi.c

+1 −2
Original line number Diff line number Diff line
@@ -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

drivers/pci/pci.h

+0 −6
Original line number Diff line number Diff line
@@ -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

include/linux/pci.h

+2 −0
Original line number Diff line number Diff line
@@ -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

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