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Date: Thu, 30 Jul 2026 14:15:40 +0200
From: Niklas Cassel <cassel@kernel.org>
To: sashiko-reviews@lists.linux.dev
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH] misc: pci_endpoint_test: Add WARN_ON() to detect broken
 EPC drivers
Message-ID: <amtAbPGO5nYA1_VE@ryzen>
References: <20260729202821.1153443-2-cassel@kernel.org>
 <20260729203850.689781F000E9@smtp.kernel.org>
 <ams9Q-34x6pjbARk@ryzen>
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In-Reply-To: <ams9Q-34x6pjbARk@ryzen>

On Thu, Jul 30, 2026 at 02:02:11PM +0200, Niklas Cassel wrote:
> On Wed, Jul 29, 2026 at 08:38:49PM +0000, sashiko-bot@kernel.org wrote:
> > - [Medium] Direct, lockless read of the internal `done` field in `struct completion` causes a data race, violates API encapsulation, and relies on a flawed TOCTOU heuristic.
> 
> Will user proper API in V2.

Seems like the proper API is to use completion_done().

But we cannot use this API, as it tries to take the
completion spin lock... so it does not work.

Will just drop this patch for now.


Kind regards,
Niklas