[Bug 47528] dapper rc: 'modprobe ipmi_si' hangs on dell 2850

[deubeulyou]

Public bug reported:

Binary package hint: linux-image-2.6.15-23-amd64-server

On a x86_64 Dell 2850, running 'modprobe ipmi_si' hangs, with the
following output in dmesg:

  [ 3845.880800] IPMI System Interface driver.
  [ 3845.880851] ipmi_si: Trying "kcs" at I/O port 0xca2
  [ 3845.935132] ipmi_si: Trying "smic" at I/O port 0xca9
  [ 3845.975059] ipmi_si: Trying "bt" at I/O port 0xe4
  ... after a while ...
  [ 4345.308627] BT: timed out in B2H_WAIT [ ]
  [ 4345.308635] restart command

modprobe never returns and can't be killed

>From dmidecode:

IPMI Device Information
        Interface Type: KCS (Keyboard Control Style)
        Specification Version: 1.5
        I2C Slave Address: 0x10
        NV Storage Device: Not Present
        Base Address: 0x0000000000000CA8 (I/O)
        Register Spacing: 32-bit Boundaries

When specifying parameters to the module, it doesn't hang but still
fails:

# modprobe ipmi_si  trydefaults=0 type=kcs addrs=0xCA8 slave_addrs=0x10
FATAL: Error inserting ipmi_si (/lib/modules/2.6.15-23-amd64-server/kernel/drivers/char/ipmi/ipmi_si.ko): No such device
dmesg in this case:
[ 3862.861365] ipmi_si: Trying "kcs" at memory address 0xca8
[ 3862.861400]  Could not set up I/O space

On the same machine, ipmi worked using a manually compiled 2.6.16.x
kernel (under debian testing), so the hardware is probably fine.

** Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

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dapper rc: 'modprobe ipmi_si' hangs on dell 2850
https://launchpad.net/bugs/47528