diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-20 16:18:29 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 05:28:03 +0900 |
| commit | 073c05b26374bcd3a7b033fa88087d721b080a75 (patch) | |
| tree | 1e7e6505c8cd1a1feb2c003a8937e1305978e10a /drivers/pci | |
| parent | 6aca02ab8bca4488b697a00bec2bdfad79b84f68 (diff) | |
PCI: acpiphp: check whether _ADR evaluation succeeded
commit dfb117b3e50c52c7b3416db4a4569224b8db80bb upstream.
Check whether we evaluated _ADR successfully. Previously we ignored
failure, so we would have used garbage data from the stack as the device
and function number.
We return AE_OK so that we ignore only this slot and continue looking
for other slots.
Found by Coverity (CID 113981).
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
[bwh: Backported to 2.6.32/3.0: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/hotplug/acpiphp_glue.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index a70fa89f76f..7bd36947deb 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -131,7 +131,12 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle)) return AE_OK; - acpi_evaluate_integer(handle, "_ADR", NULL, &adr); + status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); + if (ACPI_FAILURE(status)) { + warn("can't evaluate _ADR (%#x)\n", status); + return AE_OK; + } + device = (adr >> 16) & 0xffff; function = adr & 0xffff; |