Re: Debugging errors with Dell XPS 9560 TPM

[James Bottomley <James.Bottomley@HansenPartnership.com>]

On Fri, 2020-02-14 at 10:32 -0800, Alex Guzman wrote:
> Looks like someone had a look on the bug tracker
> (https://bugzilla.kernel.org/show_bug.cgi?id=206275#c6)
> and they figure it's definitely a regression in the kernel and should
> be reverted or rectified. They advised me to come ping here once
> more.

Reading the bugzilla, I don't get *what* needs to be reverted.  The
commit 4d6ebc4c4950595414722dfadd0b361f5a05d37e isn't present in
upstream, so what kernel is it present in, or what is the full commit
message so we can find the upstream commit?

James


> - Alex
> 
> On Sat, Feb 1, 2020 at 4:19 PM Alex Guzman <alex@guzman.io> wrote:
> > 
> > Hey there! I reported a bug on the bug tracker a bit ago but
> > haven't
> > seen any movement, so I figured I'd drop in here. My XPS 9560 has
> > been
> > having issues with its TPM, and all commands will fail with error 1
> > when operating on the TPM device. I managed to bisect it back to
> > commit 4d6ebc4c4950595414722dfadd0b361f5a05d37e (tpm: fix invalid
> > locking in NONBLOCKING mode) though it began failing with error 14
> > (bad address) at that point.
> > 
> > I reported the bug at
> > https://bugzilla.kernel.org/show_bug.cgi?id=206275 and attached
> > some
> > dmesg logs from boot there. Does anyone have any suggestions for
> > additional debugging or such to figure out what's happening here?
> > 
> > - Alex
> 
>