Bug 8480

Summary:	Bus #0a (-#0d) is hidden behind transparent bridge #09 (-#09)
Product:	Drivers	Reporter:	Stanislav Mayantsev (mastan)
Component:	PCI	Assignee:	Bernhard Kaindl (bk)
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	bunk, greg, jfceklosky, sebastian_ml
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.21.1	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	dmesg dmesg with "pci=assign-busses" lspci -v with "pci=assign-busses" dmesg.out dmesg-assign-busses.out lspci.out lspci-assign-busses.out dmesg with no assign dmesg with assign

Description Stanislav Mayantsev 2007-05-15 00:20:48 UTC

Distribution: Debian 4.0 r0
Hardware Environment: notebook Samsung X11 C001
Problem Description: kernel reports
PCI: Bus #0a (-#0d) is hidden behind transparent bridge #09 (-#09) (try
'pci=assign-busses')
Please report the result to linux-kernel to fix this permanently

Comment 1 Stanislav Mayantsev 2007-05-15 00:22:10 UTC

Created attachment 11504 [details]
dmesg

Comment 2 Stanislav Mayantsev 2007-05-15 00:24:48 UTC

Created attachment 11505 [details]
dmesg with "pci=assign-busses"

Comment 3 Stanislav Mayantsev 2007-05-15 00:29:19 UTC

Created attachment 11506 [details]
lspci -v with "pci=assign-busses"

Comment 4 Sebastian Kemper 2007-05-20 02:42:14 UTC

Hi all,

I have this as well with an Acer TravelMate 4002WLMi. Don't get me wrong, 
everything seems to work just fine no matter if I use assign-busses or not.

Regards
Sebastian

Comment 5 Sebastian Kemper 2007-05-20 02:44:03 UTC

Created attachment 11546 [details]
dmesg.out

On an Acer TravelMate 4002WLMi without pci=assign-busses

Comment 6 Sebastian Kemper 2007-05-20 02:45:15 UTC

Created attachment 11547 [details]
dmesg-assign-busses.out

On an Acer TravelMate 4002WLMi with pci=assign-busses

Comment 7 Sebastian Kemper 2007-05-20 02:45:57 UTC

Created attachment 11548 [details]
lspci.out

On an Acer TravelMate 4002WLMi without pci=assign-busses

Comment 8 Sebastian Kemper 2007-05-20 02:46:21 UTC

Created attachment 11549 [details]
lspci-assign-busses.out

On an Acer TravelMate 4002WLMi with pci=assign-busses

Comment 9 Joe Ceklosky 2007-05-23 20:31:27 UTC

I have a compal EL80 with the same issues:

PCI: Transparent bridge - 0000:00:1e.0
PCI: Bus #07 (-#0a) is hidden behind transparent bridge #06 (-#07) (try
'pci=assign-busses')
Please report the result to linux-kernel to fix this permanently

Unless I use the assign busses the ENE 712/4 flash card reader will not work

Comment 10 Joe Ceklosky 2007-05-23 20:33:32 UTC

Created attachment 11580 [details]
dmesg with no assign

Comment 11 Joe Ceklosky 2007-05-23 20:34:19 UTC

Created attachment 11581 [details]
dmesg with assign

Comment 12 Bernhard Kaindl 2007-10-16 06:25:34 UTC

Is this just a warning which I left in to be sure that the reason for it is properly dealt with, but we removed it from the normal user's sight now because we found

* that the PCI misconfiguration which is being indicated in this message only
  seems to be an issue with CardBus.
* that the CardBus fixup code which we have in place since 2.6.18 with appears
  to be sufficient.

Thus, I submitted a patch which was merged mainline with 2.6.22.6 and 2.6.23
that turns it into a message which is only enabled when debugging PCI, so in
practical users terms, the warning is gone. 


*** This bug has been marked as a duplicate of bug 7531 ***