Bug 13762
| Summary: | AHCI on HP Compaq 6715s broken, did not detect slots/ports -> unable to boot | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Matthias Tingelhoff (mindo83) |
| Component: | PCI | Assignee: | drivers_pci (drivers_pci) |
| Status: | CLOSED CODE_FIX | ||
| Severity: | normal | CC: | jbarnes, jgarzik, mindo83, rjw, serkamil, tj |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.31-rc2-git7 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 13615 | ||
| Attachments: |
broken AHCI slot/port detection
working AHCI, for comparison |
||
Created attachment 22315 [details]
working AHCI, for comparison
That's one interesting failure. Looks like register access is somehow borked. ahci 0000:00:12.0: implemented port map (0xf720ff83) contains more ports than nr_ports (1), using nr_ports ahci 0000:00:12.0: forcing PORTS_IMPL to 0x1 Here, the controller is reporting garbage for PORTS_IMPL register and then it's reporting 0x00400040 for PORT_CMD_ISSUE triggering the following failures. ata1: illegal qc_active transition (00000000->00400040) I don't think the problem is in the ahci driver proper. Something is affecting the controller in a very weird way. Can you please try to bisect it? Thanks. Hello Tejun, just finished bisecting, what a fun :) # good: [a6c140969b4685f9b9f6773c0760f55ca66d1825] Delete pcibios_select_root git bisect good a6c140969b4685f9b9f6773c0760f55ca66d1825 # bad: [a76117dfd687ec4be0a9a05214f3009cc5f73a42] x86: Use pci_claim_resource git bisect bad a76117dfd687ec4be0a9a05214f3009cc5f73a42 I hope this is helpful for you, my notebook is still smoking from that compile-marathon :) greets, Matthias Okay, pinged Matthew and Greg. Thanks a lot for bisecting. I've done more investigations with that "Use pci_claim_resource" patch, and I figured out that if pcibios_allocate_bus_resources or pcibios_assign_resources uses pci_claim_resource, it doesn't matter to my system == boots fine. But as soon pcibios_allocate_resources is using that pci_claim_resource method, the failure we're talking about here is triggered. Hope that helps in some way, at least I have something like a workaround now to see radeon KMS in it's baby-shoes :) Jeff, I can't change the product. Can you please change it to pci and reassign this bug? I didn't see a Bus/PCI, the best category I found was Drivers/PCI. CC'd PCI subsystem maintainer at any rate, that should work :) Hi Jesse. On Monday 27 July 2009, Matthias T. wrote:
> Yes, this regression still exists in 2.6.31-rc4
>
>
>
> Am Sonntag, 26. Juli 2009 22:28:24 schrieben Sie:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.30. Please verify if it still should be listed and let me know
> > (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13762
> > Subject : AHCI on HP Compaq 6715s broken, did not detect
> slots/ports ->
> > unable to boot Submitter : Matthias Tingelhoff <mindo83@t-online.de>
> > Date : 2009-07-11 20:48 (16 days old)
Caused by: commit a76117dfd687ec4be0a9a05214f3009cc5f73a42 Author: Matthew Wilcox <willy@linux.intel.com> Date: Wed Jun 17 16:33:35 2009 -0400 x86: Use pci_claim_resource First-Bad-Commit : a76117dfd687ec4be0a9a05214f3009cc5f73a42 On Monday 03 August 2009, Matthias T. wrote:
> This regression is history since rc5-git2, great job folks !
>
>
> Am Sonntag, 2. August 2009 20:58:26 schrieben Sie:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.30. Please verify if it still should be listed and let me know
> > (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13762
> > Subject : AHCI on HP Compaq 6715s broken, did not detect
> slots/ports ->
> > unable to boot Submitter : Matthias Tingelhoff <mindo83@t-online.de>
> > Date : 2009-07-11 20:48 (23 days old)
|
Created attachment 22314 [details] broken AHCI slot/port detection Hi folks, I wanted to test 2.6.31-rc to look at radeon KMS support, but the kernel doesnt boot because it cannot access my HD on my HP Compaq 6715s Notebook. I think this could affect other systems too. Everything works great using 2.6.30.1 so its some kind of regression. I attach dmesg output of both kernels for comparison. The first development version I've tested was 2.6.31-rc1, the regression also occurred there.