linux-kernel - Re: [PATCH v2] ptp: free ptp clock properly

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Date:   Mon, 9 Mar 2020 19:57:37 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Andrea Righi <andrea.righi@...onical.com>
Cc:     Vladis Dronov <vdronov@...hat.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ptp: free ptp clock properly

On Mon, Mar 09, 2020 at 06:22:38PM +0100, Andrea Righi wrote:
> There is a bug in ptp_clock_unregister() where pps_unregister_source()
> can free up resources needed by posix_clock_unregister() to properly
> destroy a related sysfs device.

This text is inadequate.  It does not identify the problem.  What
resources?  Which related device?

> Fix this by calling pps_unregister_source() in ptp_clock_release().

This statement is redundant, as we can see that from the patch itself.
Instead of saying WHAT the patch does, please explain WHY that fixes
the issue (which, as I said, you still need to identify).

Thanks,
Richard