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skge: reboot on sysfs resource0 access

To: netdev@xxxxxxxxxxx
Subject: skge: reboot on sysfs resource0 access
From: Bernd Schubert <bernd-schubert@xxxxxx>
Date: Fri, 9 Sep 2005 19:34:50 +0200
Cc: Stephen Hemminger <shemminger@xxxxxxxx>
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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?

Maybe it helps, here is a strace of mc's open for a normal file:

open("/home/bernd/notes", O_RDONLY|O_NONBLOCK|O_LARGEFILE) = 6
fstat64(6, {st_mode=S_IFREG|0644, st_size=96, ...}) = 0
fcntl64(102, F_GETFL)                   = -1 EBADF (Bad file descriptor)
read(6, "http", 4)                      = 4
mmap2(NULL, 96, PROT_READ, MAP_SHARED, 6, 0) = 0x402fe000
select(5, [4], NULL, NULL, {0, 0})      = 0 (Timeout)
select(5, [4], NULL, NULL, {0, 0})      = 0 (Timeout)
write(1, "\33[1;1H\33[m\17\33[30m\33[46mFile: notes "..., 4019) = 4019


Thanks,
        Bernd


-- 
Bernd Schubert
Physikalisch Chemisches Institut / Theoretische Chemie
Universität Heidelberg
INF 229
69120 Heidelberg
e-mail: bernd.schubert@xxxxxxxxxxxxxxxxxxxxx


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