From c7fb0b35ada6e0e691e70af5591a2006fbec85b5 Mon Sep 17 00:00:00 2001 From: Ivan Kokshaysky Date: Wed, 14 Sep 2005 23:05:30 +0400 Subject: [PATCH] [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 Signed-off-by: Linus Torvalds --- drivers/pcmcia/yenta_socket.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c index f0997c36c9b7..2e43911b4876 100644 --- a/drivers/pcmcia/yenta_socket.c +++ b/drivers/pcmcia/yenta_socket.c @@ -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;