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| author | Gavin Shan <gwshan@linux.vnet.ibm.com> | 2014-04-24 18:00:25 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-04-28 17:34:57 +1000 |
| commit | 361f2a2a1536a1d7ff6f52bf0e4848c1441e17ab (patch) | |
| tree | fd7c1239a5cb591702427d1aa9449f66b40c97da /arch/powerpc/platforms/powernv/pci.h | |
| parent | d92a208d086063ecc785b4588f74ab42268cbc4b (diff) | |
| download | lwn-361f2a2a1536a1d7ff6f52bf0e4848c1441e17ab.tar.gz lwn-361f2a2a1536a1d7ff6f52bf0e4848c1441e17ab.zip | |
powrpc/powernv: Reset PHB in kdump kernel
In the kdump scenario, the first kerenl doesn't shutdown PCI devices
and the kdump kerenl clean PHB IODA table at the early probe time.
That means the kdump kerenl can't support PCI transactions piled
by the first kerenl. Otherwise, lots of EEH errors and frozen PEs
will be detected.
In order to avoid the EEH errors, the PHB is resetted to drop all
PCI transaction from the first kerenl.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/powernv/pci.h')
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index 34a09740aad3..676232c34328 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -205,5 +205,6 @@ extern void pnv_pci_init_ioda2_phb(struct device_node *np); extern void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl, __be64 *startp, __be64 *endp, bool rm); extern void pnv_pci_reset_secondary_bus(struct pci_dev *dev); +extern int ioda_eeh_phb_reset(struct pci_controller *hose, int option); #endif /* __POWERNV_PCI_H */ |