Commit c7fb0b35 authored by Ivan Kokshaysky's avatar Ivan Kokshaysky Committed by Linus Torvalds

[PATCH] yenta oops fix

In some cases, especially on modern laptops with a lot of PCI and
cardbus bridges, we're unable to assign correct secondary/subordinate
bus numbers to all cardbus bridges due to BIOS limitations unless
we are using "pci=assign-busses" boot option.
So some cardbus controllers may not have attached subordinate pci_bus
structure, and yenta driver must cope with it - just ignore such cardbus
bridges.

For example, see https://bugzilla.novell.com/show_bug.cgi?id=113778Signed-off-by: default avatarIvan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 2fd4ef85
......@@ -1045,7 +1045,18 @@ static int __devinit yenta_probe (struct pci_dev *dev, const struct pci_device_i
{
struct yenta_socket *socket;
int ret;
/*
* If we failed to assign proper bus numbers for this cardbus
* controller during PCI probe, its subordinate pci_bus is NULL.
* Bail out if so.
*/
if (!dev->subordinate) {
printk(KERN_ERROR "Yenta: no bus associated with %s!\n",
pci_name(dev));
return -ENODEV;
}
socket = kmalloc(sizeof(struct yenta_socket), GFP_KERNEL);
if (!socket)
return -ENOMEM;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment