On Thu, Jul 07, 2016 at 08:19:56PM +0300, Ioan Moldovan wrote:
> [ioan@ioanpc ~]$ sudo cat /proc/ioports | grep 0cd6
> 0cd6-0cd7 : pnp 00:07
> 0cd6-0cd7 : smba_idx
>
> Look like pnp & smba_idx, no idea what those 2 are!
>
Please don't drop the mailing list from your replies; others may be interested
in the problem as well. Also, please avoid top-posting.
The culprit is drivers/i2c/busses/i2c-piix4.c, which specifically requests
IO address 0xcd6-0cd7. In earlier kernels, that driver released the region
after it was done with its initialization. This is no longer the case;
instead, the region is only released when the driver is unloaded.
In other words, it is now either-or. You can load the watchdog driver
or the i2c driver, but not both.
This was introduced with commit 2fee61d22e60 ("i2c: piix4: Add support
for multiplexed main adapter in SB800"). Copying the author and the i2c
mailing list for comments.
Guenter
> 2016-07-07 18:14 GMT+03:00 Guenter Roeck <linux@xxxxxxxxxxxx>:
> > On 07/07/2016 06:12 AM, Ioan Moldovan wrote:
> >>
> >> At every boot of my PC I noticed the following error telling me the IO
> >> address 0x0cd6 is already in use:
> >>
> >> [ 6.083233] sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver v0.05
> >> [ 6.083292] sp5100_tco: PCI Vendor ID: 0x1022, Device ID: 0x780b,
> >> Revision ID: 0x16
> >> [ 6.083296] sp5100_tco: I/O address 0x0cd6 already in use
> >>
> >> Not being a kernel developer, I have no way to fix this.
> >>
> >
> > You probably won't be able to fix it. Try "sudo cat /proc/ioports";
> > it might tell you who is using that io address space.
> >
> > Guenter
> >
> >> CPU Details:
> >> vendor_id : AuthenticAMD
> >> cpu family : 21
> >> model : 48
> >> model name : AMD Athlon(tm) X4 860K Quad Core Processor
> >> stepping : 1
> >> microcode : 0x6003104
> >> --
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> >>
> >
>
>
>
> --
> Ioan Moldovan
> ioan.moldovan1999@xxxxxxxxx
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