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powerpc/pseries: Drop config requests in EEH accessors

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The pSeires EEH config accessors rely on rtas_{read, write}_config()
and the condition to check if the PE's config space is blocked
should be moved to those 2 functions so that config requests from
kernel, userland, EEH core can be dropped to avoid recursive EEH error
if necessary.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Gavin Shan 2014-10-01 17:07:52 +10:00 committed by Michael Ellerman
parent d2cfbcd7c8
commit 3409eb4e69
1 changed files with 11 additions and 19 deletions
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30
arch/powerpc/kernel/rtas_pci.c
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@ -66,6 +66,11 @@ int rtas_read_config(struct pci_dn *pdn, int where, int size, u32 *val)
return PCIBIOS_DEVICE_NOT_FOUND;
if (!config_access_valid(pdn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
#ifdef CONFIG_EEH
if (pdn->edev && pdn->edev->pe &&
(pdn->edev->pe->state & EEH_PE_CFG_BLOCKED))
return PCIBIOS_SET_FAILED;
#endif
addr = rtas_config_addr(pdn->busno, pdn->devfn, where);
buid = pdn->phb->buid;
@ -90,9 +95,6 @@ static int rtas_pci_read_config(struct pci_bus *bus,
struct device_node *busdn, *dn;
struct pci_dn *pdn;
bool found = false;
#ifdef CONFIG_EEH
struct eeh_dev *edev;
#endif
int ret;
/* Search only direct children of the bus */
@ -109,11 +111,6 @@ static int rtas_pci_read_config(struct pci_bus *bus,
if (!found)
return PCIBIOS_DEVICE_NOT_FOUND;
#ifdef CONFIG_EEH
edev = of_node_to_eeh_dev(dn);
if (edev && edev->pe && edev->pe->state & EEH_PE_CFG_BLOCKED)
return PCIBIOS_DEVICE_NOT_FOUND;
#endif
ret = rtas_read_config(pdn, where, size, val);
if (*val == EEH_IO_ERROR_VALUE(size) &&
@ -132,6 +129,11 @@ int rtas_write_config(struct pci_dn *pdn, int where, int size, u32 val)
return PCIBIOS_DEVICE_NOT_FOUND;
if (!config_access_valid(pdn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
#ifdef CONFIG_EEH
if (pdn->edev && pdn->edev->pe &&
(pdn->edev->pe->state & EEH_PE_CFG_BLOCKED))
return PCIBIOS_SET_FAILED;
#endif
addr = rtas_config_addr(pdn->busno, pdn->devfn, where);
buid = pdn->phb->buid;
@ -155,10 +157,6 @@ static int rtas_pci_write_config(struct pci_bus *bus,
struct device_node *busdn, *dn;
struct pci_dn *pdn;
bool found = false;
#ifdef CONFIG_EEH
struct eeh_dev *edev;
#endif
int ret;
/* Search only direct children of the bus */
busdn = pci_bus_to_OF_node(bus);
@ -173,14 +171,8 @@ static int rtas_pci_write_config(struct pci_bus *bus,
if (!found)
return PCIBIOS_DEVICE_NOT_FOUND;
#ifdef CONFIG_EEH
edev = of_node_to_eeh_dev(dn);
if (edev && edev->pe && (edev->pe->state & EEH_PE_CFG_BLOCKED))
return PCIBIOS_DEVICE_NOT_FOUND;
#endif
ret = rtas_write_config(pdn, where, size, val);
return ret;
return rtas_write_config(pdn, where, size, val);
}
static struct pci_ops rtas_pci_ops = {