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Subjectsuspicious pci hang

Kind Kernel Peoples:

Upon upgrading from the stock 2.2.14 kernel to the up2date RedHat 6.2
2.2.19-6.2.7 kernel, the following line in my driver makes the system
fully hang:

x = inl(reg->bmsr);

The board is in a pci space. I suspect the board simultaneously
died some time around the upgrade or the perhaps the pci hardware
implementation is not quite stable, or, maybe something changed in the
kernel.

Yes, reg->bmsr contains a valid address (0x0000ec7c) and this value did
not get "stomped on" since the PCI block was requested. Further, I know
this is the culprit by using {return -1;} before and after this line and
observing hang/nohang behaviour.

TIA and patiently waiting,
John Stasko, Department of Physics, University of Florida
CMS project at CERN, Geneva

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