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SubjectRe: [PATCH] ipmi: Cleanup oops on initialization failure
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On 06/21/2018 01:47 AM, Meelis Roos wrote:
>>> The corresponding dmesg:
>>>
>>> [ 7.372830] IPMI System Interface driver.
>>> [ 7.373034] ipmi_si dmi-ipmi-si.0: ipmi_platform: probing via SMBIOS
>>> [ 7.373109] ipmi_si: SMBIOS: mem 0x0 regsize 1 spacing 1 irq 0
>>> [ 7.373182] ipmi_si: Adding SMBIOS-specified kcs state machine
>>> [ 7.373352] ipmi_si: Trying SMBIOS-specified kcs state machine at mem
>>> address 0x0, slave address 0x20, irq 0
>>> [ 7.373479] ipmi_si dmi-ipmi-si.0: Could not set up I/O space
>>>
>>>> BTW, can you send me at least the IPMI portion of the output of
>>>> dmidecode for your machine? I have seen a lot of these where the
>>>> address in the SMBIOS tables is incorrect, and I'm wondering if
>>>> it's something in the driver, or if it's really the tables that
>>>> are bad.
>>> Handle 0x001B, DMI type 38, 18 bytes
>>> IPMI Device Information
>>> Interface Type: KCS (Keyboard Control Style)
>>> Specification Version: 2.0
>>> I2C Slave Address: 0x10
>>> NV Storage Device: Not Present
>>> Base Address: 0x0000000000000000 (Memory-mapped)
>>> Register Spacing: Successive Byte Boundaries
>> Thanks a bunch.  It looks like the SMBIOS tables are wrong.  I
>> wonder if this is what some vendor do if there is no IPMI device
>> installed.  I guess I need to add a check for this.
> Another machine (Sun X2100) with similar crash is also cured by the
> patch, but this is slightly different (not NULL):
>
> [ 8.891217] IPMI System Interface driver.
> [ 8.898404] ipmi_si dmi-ipmi-si.0: ipmi_platform: probing via SMBIOS
> [ 8.905635] ipmi_si: SMBIOS: io 0xca2 regsize 1 spacing 1 irq 0
> [ 8.912895] ipmi_si: Adding SMBIOS-specified kcs state machine
> [ 8.920246] ipmi_si: Trying SMBIOS-specified kcs state machine at i/o address 0xca2, slave address 0x20, irq 0
> [ 8.934379] ipmi_si dmi-ipmi-si.0: Interface detection failed
>
> IPMI Device Information
> Interface Type: KCS (Keyboard Control Style)
> Specification Version: 1.5
> I2C Slave Address: 0x10
> NV Storage Device: Not Present
> Base Address: 0x0000000000000CA2 (I/O)
> Register Spacing: Successive Byte Boundaries
>

That's even worse.  The SMBIOS table says the interface is there, but
it's not
there.  Not much I can do about that :(.

Thanks again,

-corey

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