[Bugme-new] [Bug 9121] New: BUG: sleeping function called from invalid context at kernel/rwsem.c:20

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=9121

           Summary: BUG: sleeping function called from invalid context at
                    kernel/rwsem.c:20
           Product: Drivers
           Version: 2.5
     KernelVersion: 2.6.22.9
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: EDAC
        AssignedTo: drivers_edac at kernel-bugs.osdl.org
        ReportedBy: snecklifter at gmail.com
                CC: cebbert at redhat.com


Most recent kernel where this bug did not occur: Unknown
Distribution: Fedora 7
Hardware Environment: 

http://snecker.fedorapeople.org/lshal.txt
http://snecker.fedorapeople.org/dmidecode.txt
http://snecker.fedorapeople.org/lspci.txt
http://snecker.fedorapeople.org/dmesg.txt

Software Environment: 2.6.22.9-91.fc7

Problem Description:

BUG: sleeping function called from invalid context at kernel/rwsem.c:20
in_atomic():0, irqs_disabled():1
 [<c043b796>] down_read+0x12/0x28
 [<c04f7522>] pci_get_subsys+0x71/0xf3
 [<c042ff4f>] process_timeout+0x0/0x5
 [<c04f75ba>] pci_get_device+0x16/0x19
 [<f8c518cf>] edac_kernel_thread+0x94/0xef [edac_mc]
 [<f8c5183b>] edac_kernel_thread+0x0/0xef [edac_mc]
 [<c0438682>] kthread+0x38/0x5e
 [<c043864a>] kthread+0x0/0x5e
 [<c0405b6b>] kernel_thread_helper+0x7/0x10
 =======================
EDAC PCI: Signaled System Error on 0000:00:19.0
EDAC PCI: Bridge Signaled System Error on 0000:00:19.0
EDAC PCI: Bridge Detected Parity Error on 0000:00:19.0

Full log at:

http://snecker.fedorapeople.org/dmesg_with_edac_loaded.txt

Steps to reproduce:

# /sbin/modprobe edac_mc
# echo 1 > /sys/devices/system/edac/pci/check_pci_parity

This is also seen on x86_64 as per:

https://bugzilla.redhat.com/show_bug.cgi?id=299821

This was also reported on:

http://lkml.org/lkml/2007/9/21/537

without response.

System stability does not appear to be affected and the driver can be unloaded
without error, stopping above messages.


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