renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-30 16:13:54 +08:00
Code

ACPI / PCI root: Clear driver_data before failing enumeration

Browse Source 
If a PCI host bridge cannot be enumerated due to an error in
pci_acpi_scan_root(), its ACPI device object's driver_data field
has to be cleared by acpi_pci_root_add() before freeing the
object pointed to by that field, or some later acpi_pci_find_root()
checks that should fail may succeed and cause quite a bit of
confusion to ensue.

Fix acpi_pci_root_add() to clear device->driver_data before
returning an error code as appropriate.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
This commit is contained in:
Rafael J. Wysocki 2013-11-14 00:54:17 +01:00
parent c1beb0bdb5
commit f516bde512
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/acpi/pci_root.c
View File

@ -525,6 +525,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
dev_err(&device->dev,
"Bus %04x:%02x not present in PCI namespace\n",
root->segment, (unsigned int)root->secondary.start);
device->driver_data = NULL;
result = -ENODEV;
goto end;
}