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| author | Ivan Kokshaysky <ink@jurassic.park.msu.ru> | 2005-09-14 23:05:30 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-14 12:28:15 -0700 |
| commit | c7fb0b35ada6e0e691e70af5591a2006fbec85b5 (patch) | |
| tree | 04e058f2bd4a9ed1b7940bf7ff5b461a380e90b0 /drivers/pcmcia | |
| parent | 2fd4ef85e0db9ed75c98e13953257a967ea55e03 (diff) | |
| download | linux-c7fb0b35ada6e0e691e70af5591a2006fbec85b5.tar.gz linux-c7fb0b35ada6e0e691e70af5591a2006fbec85b5.tar.bz2 linux-c7fb0b35ada6e0e691e70af5591a2006fbec85b5.zip | |
[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>
Diffstat (limited to 'drivers/pcmcia')
| -rw-r--r-- | drivers/pcmcia/yenta_socket.c | 13 |
1 files changed, 12 insertions, 1 deletions
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; |