On Mon, 24 Aug 2009, Michael Ellerman wrote:
> On Mon, 2009-08-24 at 12:31 +0530, Sachin Sant wrote:
> > While trying to boot 2.6.31-rc7 on a power6 machine came
> > across the following Bug.
> >
> > Starting udev: ------------[ cut here ]------------
> > kernel BUG at drivers/rtc/rtc-ps3.c:36!
> > cpu 0x0: Vector: 700 (Program Check) at [c0000000f70f3570]
> > pc: c00000000059a020: .ps3_get_time+0x3c/0x84
> > lr: c00000000059a018: .ps3_get_time+0x34/0x84
> > sp: c0000000f70f37f0
> > msr: 8000000000029032
> > current = 0xc0000000f8d14ee0
> > paca = 0xc0000000012cc300
> > pid = 159, comm = hwclock
> > kernel BUG at drivers/rtc/rtc-ps3.c:36!
>
> > static u64 read_rtc(void)
> > {
> > ....
> > result = lv1_get_rtc(&rtc_val, &tb_val);
> > BUG_ON(result);
> >
> > I had never tried enabling CONFIG_RTC_DRV_PS3 option before
> > so not sure if this is a new problem or an old one.
>
> Looks like an old one, or at least as long as the driver has existed.
>
> The code needs to cope with being called on something other than a PS3.
> Either the platform driver is only registered if the machine is a PS3,
> or ps3_rtc_probe() actually does something to check it's on a PS3 before
> registering the rtc_device.
Bummer, how could we have missed that one?
Cooking a patch...
With kind regards,
Geert Uytterhoeven
Software Architect
Techsoft Centre
Technology and Software Centre Europe
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E-mail: geert.uytterhoe...@sonycom.com
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