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PCI: Enable ATS at the device state restore

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During S3 or S4 resume or PCI reset, ATS regs aren't restored correctly.
This patch enables ATS at the device state restore if PCI device has ATS
capability.

Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Hao, Xudong 2011-12-17 21:24:40 +08:00 • committed by Jesse Barnes
parent 424eb39159
commit 1900ca132f
3 changed files with 26 additions and 0 deletions
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8
drivers/pci/pci.h
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@ -251,6 +251,14 @@ struct pci_sriov {
u8 __iomem *mstate; /* VF Migration State Array */
};
#ifdef CONFIG_PCI_ATS
extern void pci_restore_ats_state(struct pci_dev *dev);
#else
static inline void pci_restore_ats_state(struct pci_dev *dev)
{
}
#endif /* CONFIG_PCI_ATS */
#ifdef CONFIG_PCI_IOV
extern int pci_iov_init(struct pci_dev *dev);
extern void pci_iov_release(struct pci_dev *dev);