Commit c7fb0b35 authored Sep 14, 2005 by Ivan Kokshaysky Committed by Linus Torvalds Sep 14, 2005

[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=113778



Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 2fd4ef85

drivers/pcmcia/yenta_socket.c

+12 −1

Original line number	Diff line number	Diff line
		@@ -1046,6 +1046,17 @@ 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;