I only found this commit https://github.com/raspberrypi/linux/commit/1e5ac6300a07ceecfc70a893ebef3352be21e6f8# related to the problem. BR, Paul On Tue, Mar 23, 2021 at 7:51 AM Paul Enuta <paulenuta@xxxxxxxxx> wrote: > > Hi, > it happens with 5.10.25-v7l (latest mainline in Raspberry PI OS) and > in my test it started with 5.10.0-v7+. > 5.4.83-v7+ was OK. > Problems occur on fresh and clean installs with kernel versions above 5.10. > This quick fix solves: > --- tpm-chip.c.orig 2021-03-22 17:43:05.433433496 +0000 > +++ tpm-chip.c 2021-03-22 18:22:52.000000000 +0000 > @@ -101,6 +101,11 @@ > { > int ret; > > + if (!chip->ops) { > + pr_err("%s: Avoiding NULL ops pointer\n", __func__); > + return -EIO; > + } > + > tpm_clk_enable(chip); > > if (chip->locality == -1) { > > On Tue, Mar 23, 2021 at 4:09 AM Jarkko Sakkinen <jarkko@xxxxxxxxxx> wrote: > > > > On Mon, Mar 22, 2021 at 11:01:09PM +0200, Paul Enuta wrote: > > > Dear all, > > > > > > As described in the issue here: > > > https://github.com/raspberrypi/linux/issues/4228 > > > and here: > > > https://www.raspberrypi.org/forums/viewtopic.php?f=75&t=303564&p=1817702#p1839351 > > > starting with kernel 5.10.XX we encounter a system hang with kernel > > > panic at poweroff or reboot if we have dtoverlay=tpm-slb9670 loaded. > > > Applying the patch proposed here: > > > https://github.com/raspberrypi/linux/issues/4228#issuecomment-804081079 > > > and rebuilding the kernel solves the issue. > > > > > > Please review the issue and provide guidance finding the cause and solving. > > > > > > Kind regards, > > > Paul Enuta > > > > > > So does this happen with the latest mainline? Patched kernels are not our > > concern. > > > > > > /Jarkko
