diff options
| author | David S. Miller <davem@ultra5.davemloft.net> | 2007-06-06 23:03:08 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-06-08 01:59:46 +0200 |
| commit | 321566c2504445160b18e1508a73081579923a6b (patch) | |
| tree | a81be2b3ca7f3423830faf79368cfc9c847c4af8 | |
| parent | Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sp... (diff) | |
| download | linux-321566c2504445160b18e1508a73081579923a6b.tar.xz linux-321566c2504445160b18e1508a73081579923a6b.zip | |
[SPARC64]: Fix 2 bugs in PCI Sabre bus scanning.
If we are on hummingbird, bus runs at 66MHZ.
pbm->pci_bus should be setup with the result of pci_scan_one_pbm()
or else we deref NULL pointers in the error interrupt handlers.
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc64/kernel/pci_sabre.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/arch/sparc64/kernel/pci_sabre.c b/arch/sparc64/kernel/pci_sabre.c index 323d6c278518..22e1be5c7489 100644 --- a/arch/sparc64/kernel/pci_sabre.c +++ b/arch/sparc64/kernel/pci_sabre.c @@ -636,13 +636,18 @@ static void apb_init(struct pci_bus *sabre_bus) static void sabre_scan_bus(struct pci_pbm_info *pbm) { static int once; - struct pci_bus *pbus; /* The APB bridge speaks to the Sabre host PCI bridge * at 66Mhz, but the front side of APB runs at 33Mhz * for both segments. + * + * Hummingbird systems do not use APB, so they run + * at 66MHZ. */ - pbm->is_66mhz_capable = 0; + if (hummingbird_p) + pbm->is_66mhz_capable = 1; + else + pbm->is_66mhz_capable = 0; /* This driver has not been verified to handle * multiple SABREs yet, so trap this. @@ -656,13 +661,13 @@ static void sabre_scan_bus(struct pci_pbm_info *pbm) } once++; - pbus = pci_scan_one_pbm(pbm); - if (!pbus) + pbm->pci_bus = pci_scan_one_pbm(pbm); + if (!pbm->pci_bus) return; - sabre_root_bus = pbus; + sabre_root_bus = pbm->pci_bus; - apb_init(pbus); + apb_init(pbm->pci_bus); sabre_register_error_handlers(pbm); } |