On Fri, 9 Sep 2005 19:38:17 +0200
Bernd Schubert <bernd.schubert@xxxxxxxxxxxxxxxxxxxxx> wrote:
> Hello,
>
> today we tried 2.6.13 on our server and also tried to use the skge driver.
> Well, in principle it works fine, until I became curious about the sysfs
> values. Stupid me, I was using the midnight commander to read the values.
> When I opened "/sys/bus/pci/drivers/skge/0000:01:01.0/resource0", the system
> immediately rebooted. After the reboot we tested using cat to the resource0
> file, which gave an input/output error. Using again the mc, the system again
> immediately rebooted.
> Well, I guess I better don't use the midnight commander in the future, but
> somehow I think it shouldn't cause the system to reboot, should it? Is the
> i/o error of cat supposed to happen?
>
Don't do that! resource0 is the pci space for the card and
reading it directly accesses the memory mapped space. The
register is sparse, and some places are unaccessable.
Accessing non-existent memory will cause system to hang and if you
are lucky a timeout and reboot.
Sorry, this is not a driver bug.
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