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
