Re: tps65219/am62p kernel oops

[Alexander Sverdlin]

Hi Shree,

On Tue, 2025-12-09 at 12:16 -0600, Shree Ramamoorthy wrote:
> > > > > > > while working on adding support in mainline for a new board based on TI
> > > > > > > AM62P SoC I noticed the following Kernel Oops.
> > > > > > > 
> > > > > > > This oops was reproduced running current Linux
> > > > > > > master, 6.15.0-rc4+, ca91b9500108d4cf083a635c2e11c884d5dd20ea, but I was able
> > > > > > > to reproduce the same with 6.14.4.
> > > > > > > 
> > > > > > [...]
> > > > > > > [  +0.000022] Call trace:
> > > > > > > [  +0.000011]  regulator_notifier_call_chain+0x20/0xa4 (P)
> > > > > > > [  +0.000018]  tps65219_regulator_irq_handler+0x34/0x80
> > > > > > wild guessing: maybe because irqdata->rdev is not initalized in
> > > > > > _probe()? At least I do not see where it would be initialized.
> > > > > your wild guess seems correct, I'll send a proper patch with your
> > > > > suggested-by after doing a couple of more tests, thanks.
> > > > so, the bug is clear, however the fix is not an obvious one liner as I was
> > > > wishing.
> > > > 
> > > > we would need to add a link from each of the interrupts to the specific
> > > > regulator. as of now such a connection is not existing in the code.
> > > I'll try out implementing and testing the solution, but will get to it early next week. Will email with any updates!
> > What's the status on this? Were you able to do any progress or work on
> > it?
> > 
> > Thanks
> > Francesco
> 
> Thanks for following up on this, the task got lost on my end. My apologies!
> The original line deleted `irq_data[i].rdev = rdev;` was never replaced.
> The correct code should be re-implementing a version of the tps65219_get_rdev_by_name() function that was removed in commit 64a6b57
> & add in irq_data.rdev = rdev;` where the other irq_data fields are being assigned within _probe.
> 
> Is there anything missing with this solution?

Thanks for looking into this issue!

I would be happy to test your patch, but cannot find it.
Have you published it in the meanwhile?

Regards,
-- 
Alexander Sverdlin.