From: Keith Busch <kbusch@kernel.org>
To: Lukas Wunner <lukas@wunner.de>
Cc: "Jozef Matejcik (Nokia)" <jozef.matejcik@nokia.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>
Subject: Re: pci_probe called concurrently in machine with 2 identical PCI devices causing race condition
Date: Thu, 26 Jun 2025 09:41:58 -0600 [thread overview]
Message-ID: <aF1qRv0XlT4EDN-Y@kbusch-mbp> (raw)
In-Reply-To: <aF08kFNy8qrI8LvD@wunner.de>
On Thu, Jun 26, 2025 at 02:26:56PM +0200, Lukas Wunner wrote:
> On Thu, Jun 26, 2025 at 12:20:48PM +0000, Jozef Matejcik (Nokia) wrote:
> > However, I think this can happen in any machine with 2 identical
> > PCI devices, because as far as I know, existing PCI drivers usually
> > do not assume that probe function can be called from multiple threads.
>
> That can happen all the time and it would be a bug in the driver
> if it caused issues.
Wait, is that true? I thought that would only happen if the driver
indicated probe_type PROBE_PREFER_ASYNCHRONOUS. The default appears to
still be the same as PROBE_FORCE_SYNCHRONOUS.
next prev parent reply other threads:[~2025-06-26 15:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-26 10:14 pci_probe called concurrently in machine with 2 identical PCI devices causing race condition Jozef Matejcik (Nokia)
2025-06-26 12:08 ` Lukas Wunner
2025-06-26 12:20 ` Jozef Matejcik (Nokia)
2025-06-26 12:26 ` Lukas Wunner
2025-06-26 15:41 ` Keith Busch [this message]
2025-06-26 18:16 ` Jozef Matejcik (Nokia)
2025-06-26 22:37 ` Keith Busch
2025-07-04 8:03 ` Lukas Wunner
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