From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 73931] New: rmmod radeon and kernel crash
Date: Sun, 13 Apr 2014 06:48:14 +0000
Message-ID: <bug-73931-2300@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=73931

            Bug ID: 73931
           Summary: rmmod radeon and kernel crash
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.14
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: pali.rohar@gmail.com
        Regression: No

Created attachment 132051
  --> https://bugzilla.kernel.org/attachment.cgi?id=132051&action=edit
rmmod_radeon_kernel_panic

After calling rmmod radeon, kernel show lots of error lines and then crash.

It looks like that radeon module does not cleanup hwmon interface at exit.
After calling rmmod radeon there is still hwmon interface:

$ readlink /sys/class/hwmon/hwmon1
../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/hwmon/hwmon1

And after calling ls, or cat in hwmon1 kernel crash...

See attachment from syslog.

$ lspci -nn
01:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Sun
XT [Radeon HD 8670A/8670M/8690M] [1002:6660]

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