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| author | Ivan Kokshaysky <ink@jurassic.park.msu.ru> | 2005-07-07 03:07:56 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-06 16:12:58 -0700 |
| commit | 960b8466548c9bc6f718b5f470c1a58000fab09d (patch) | |
| tree | 9dfe507f4b1d5dcde83249754a66d76a9851294f /drivers/pci/setup-bus.c | |
| parent | 107177410b754b597028e430725bc3b316936b6b (diff) | |
| download | linux-960b8466548c9bc6f718b5f470c1a58000fab09d.tar.bz2 | |
[PATCH] yet another fix for setup-bus.c/x86 merge
There is a slight disagreement between setup-bus.c code and traditional
x86 PCI setup wrt which recourses are invalid vs resources that are free
for further allocations.
In particular, in the setup-bus.c, if we failed to allocate some resource,
we nullify "start" and "flags" fields, but *not* the "end" one.
But x86 pcibios_enable_resources() does the following check:
if (!r->start && r->end) {
printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
return -EINVAL;
which means that the device owning the offending resource cannot be
enabled.
In particular, this breaks cardbus behind the normal decode p2p bridge -
the cardbus code from setup-bus.c requests rather large IO and MEM
windows, and if it fails, the socket is completely unavailable. Which
is wrong, as the yenta code is capable to allocate smaller windows.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/pci/setup-bus.c')
| -rw-r--r-- | drivers/pci/setup-bus.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index c1bdfb424658..9fe48f712be9 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -74,6 +74,7 @@ pbus_assign_resources_sorted(struct pci_bus *bus) idx = res - &list->dev->resource[0]; if (pci_assign_resource(list->dev, idx)) { res->start = 0; + res->end = 0; res->flags = 0; } tmp = list; |