lkml.org 
[lkml]   [2005]   [Jul]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch 2.6.13-rc2] yet another fix for setup-bus.c/x86 merge
On Thu, Jul 07, 2005 at 03:07:56AM +0400, Ivan Kokshaysky wrote:
> 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.
> Precisely, 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>

Acked-by: Greg Kroah-Hartman <gregkh@suse.de>

Thanks Ivan for finding this so quickly.

greg k-h
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-07-07 01:22    [W:0.044 / U:0.200 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site