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[POWERPC] EEH: Avoid crash on null device 

Bugfix: avoid crash if there's no PCI device for a given
openfirmware node.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Linas Vepstas 2007-11-03 07:29:01 +11:00 committed by Paul Mackerras
parent 2a50f144fc
commit b37ceefe7c
1 changed files with 8 additions and 3 deletions
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11
arch/powerpc/platforms/pseries/eeh.c
View File

@ -186,6 +186,11 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
n += scnprintf(buf+n, len-n, "cmd/stat:%x\n", cfg);
printk(KERN_WARNING "EEH: PCI cmd/status register: %08x\n", cfg);
if (!dev) {
printk(KERN_WARNING "EEH: no PCI device for this of node\n");
return n;
}
/* Gather bridge-specific registers */
if (dev->class >> 16 == PCI_BASE_CLASS_BRIDGE) {
rtas_read_config(pdn, PCI_SEC_STATUS, 2, &cfg);
@ -198,7 +203,7 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
}
/* Dump out the PCI-X command and status regs */
cap = pci_find_capability(pdn->pcidev, PCI_CAP_ID_PCIX);
cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
if (cap) {
rtas_read_config(pdn, cap, 4, &cfg);
n += scnprintf(buf+n, len-n, "pcix-cmd:%x\n", cfg);
@ -210,7 +215,7 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
}
/* If PCI-E capable, dump PCI-E cap 10, and the AER */
cap = pci_find_capability(pdn->pcidev, PCI_CAP_ID_EXP);
cap = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (cap) {
n += scnprintf(buf+n, len-n, "pci-e cap10:\n");
printk(KERN_WARNING
@ -222,7 +227,7 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
printk(KERN_WARNING "EEH: PCI-E %02x: %08x\n", i, cfg);
}
cap = pci_find_ext_capability(pdn->pcidev, PCI_EXT_CAP_ID_ERR);
cap = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (cap) {
n += scnprintf(buf+n, len-n, "pci-e AER:\n");
printk(KERN_WARNING