[BUG][RT][ti-j72xx] spi: cadence-quadspi: boot failed with rtmutex deadlock detected

[Mark Brown]

On Wed, Dec 17, 2025 at 08:21:19AM +0000, He, Guocai (CN) wrote:

> Kernel:
>   v6.1/standard/preempt-rt/ti-sdk-6.1/ti-j7xxx
>   (based on Linux v6.1.159 PREEMPT_RT)

v6.1 is pretty old.

> It is ok at da3c5173c55f，but it is bad at 7083c6620486.
> I revert the commit(2c914aac952) which merged from stable release,  it also ok at 18db8c7f20a6.
> Maybe it is a compatibility issue between v6.1/standard/preempt-rt/ti-sdk-6.1/ti-j7xxx and the stable release.

> if this is an known issue ? 

This isn't something I've heard about before, and there are no fixes for
that commit in -next.  It's entirely plausible that whatever issue this
is also exists in mainline, looking at the patch it's likely there were
problems before this with the locking just not happening properly at all.

Please include human readable descriptions of things like commits and
issues being discussed in e-mail in your mails, this makes them much
easier for humans to read especially when they have no internet access.
I do frequently catch up on my mail on flights or while otherwise
travelling so this is even more pressing for me than just being about
making things a bit easier to read.
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