[PATCH] coresight: perf: Fix pointer check with IS_ERR_OR_NULL()

[Leo Yan]

On Thu, Sep 04, 2025 at 01:11:37PM +0100, James Clark wrote:

[...]

> > I think the bug is in TRBE. It's the only one that returns an error
> > pointer, but only for -ENOMEM which would normally be NULL for alloc
> > type functions anyway.

Thought again, you are right — it is better to fix this in TRBE, since
we don't really get any benefit from an artificial "-ENOMEM".

Will respin a new one.

Thanks,
Leo