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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2017-07-10 17:58:46 +0300
committerBjorn Helgaas <bhelgaas@google.com>2017-07-31 22:37:53 +0300
commit902d886d4474a4d2661ae337f3c30dc7a8e59f28 (patch)
tree55cb8ca98a66d1325d1ff7d516eedcec4b20b56d /arch/mips
parent16f73eb02d7e1765ccab3d2018e0bd98eb93d973 (diff)
downloadlinux-902d886d4474a4d2661ae337f3c30dc7a8e59f28.tar.xz
MIPS: PCI: Fix pcibios_scan_bus() NULL check code path
If pci_scan_root_bus() fails (ie returns NULL) pcibios_scan_bus() must return immediately since the struct pci_bus pointer it returns is not valid and cannot be used. Move code checking the pci_scan_root_bus() return value to reinstate proper pcibios_scanbus() error path behaviour. Fixes: 88555b481958 ("MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERIC") Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@imgtec.com>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/pci/pci-legacy.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/mips/pci/pci-legacy.c b/arch/mips/pci/pci-legacy.c
index 174575a9a112..71d62f818d77 100644
--- a/arch/mips/pci/pci-legacy.c
+++ b/arch/mips/pci/pci-legacy.c
@@ -89,16 +89,16 @@ static void pcibios_scanbus(struct pci_controller *hose)
pci_add_resource(&resources, hose->busn_resource);
bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
&resources);
- hose->bus = bus;
-
- need_domain_info = need_domain_info || pci_domain_nr(bus);
- set_pci_need_domain_info(hose, need_domain_info);
-
if (!bus) {
pci_free_resource_list(&resources);
return;
}
+ hose->bus = bus;
+
+ need_domain_info = need_domain_info || pci_domain_nr(bus);
+ set_pci_need_domain_info(hose, need_domain_info);
+
next_busno = bus->busn_res.end + 1;
/* Don't allow 8-bit bus number overflow inside the hose -
reserve some space for bridges. */