From: Oleksij Rempel <o.rempel@pengutronix.de>
To: Carlo Szelinsky <github@szelinsky.de>
Cc: Kory Maincent <kory.maincent@bootlin.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@kernel.org>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Simon Horman <horms@kernel.org>,
Kyle Swenson <kyle.swenson@est.tech>, Ross Cawston <ross@r-sc.ca>,
netdev-bot+sashiko@kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net v2 01/14] net: pse-pd: size the notification kfifo after defaulting nr_lines
Date: Wed, 21 Oct 2026 07:17:38 +0200 [thread overview]
Message-ID: <athK8pD1fOINOAV6@pengutronix.de> (raw)
In-Reply-To: <20261020171249.853085-2-github@szelinsky.de>
On Tue, Oct 20, 2026 at 07:12:36PM +0200, Carlo Szelinsky wrote:
> pse_controller_register() allocates the notification kfifo before it
> turns nr_lines == 0 into 1, and kfifo_alloc() fails for a size below 2.
> So a controller with nr_lines 0 or 1 cannot register. pse_regulator
> (podl-pse-regulator) never sets nr_lines, so its probe has failed with
> -EINVAL ever since the kfifo was added.
>
> Apply the default first, and allocate at least two entries.
>
> Triggered in QEMU (arm64) with a test-only PSE controller with
> nr_lines 0: its probe failed with "failed to allocate kfifo
> notifications". With this patch it registers.
>
> Fixes: ffef61d6d273 ("net: pse-pd: Add support for budget evaluation strategies")
> Reviewed-by: Kory Maincent <kory.maincent@bootlin.com>
> Signed-off-by: Carlo Szelinsky <github@szelinsky.de>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Thank you!
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next prev parent reply other threads:[~2026-10-21 5:17 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-20 17:12 [PATCH net v2 00/14] net: pse-pd: assorted lifetime and error-path fixes Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 01/14] net: pse-pd: size the notification kfifo after defaulting nr_lines Carlo Szelinsky
2026-10-21 5:17 ` Oleksij Rempel [this message]
2026-10-20 17:12 ` [PATCH net v2 02/14] net: pse-pd: remove dead pi_get_admin_state() checks Carlo Szelinsky
2026-10-21 5:19 ` Oleksij Rempel
2026-10-20 17:12 ` [PATCH net v2 03/14] net: pse-pd: fix module refcount leak in pse_control_get_internal() Carlo Szelinsky
2026-10-21 5:24 ` Oleksij Rempel
2026-10-20 17:12 ` [PATCH net v2 04/14] net: pse-pd: do not keep a failed IRQ in pcdev->irq Carlo Szelinsky
2026-10-21 5:26 ` Oleksij Rempel
2026-10-20 17:12 ` [PATCH net v2 05/14] net: pse-pd: do not reach a freed PHY from the notification worker Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 06/14] net: pse-pd: check the PI state under the lock when setting a power limit Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 07/14] net: pse-pd: do not tie a shared power domain to its creator's devres Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 08/14] net: pse-pd: stop async event sources before freeing PI data in unregister Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 09/14] net: pse-pd: unregister from the controller list before freeing PI data Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 10/14] net: pse-pd: keep the PI data until the PI regulators are gone Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 11/14] net: pse-pd: unwind allocations when controller registration fails Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 12/14] net: pse-pd: use each PI's own supply handle for the power budget Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 13/14] net: pse-pd: pd692x0: release the manager power budget through devres Carlo Szelinsky
2026-10-20 17:12 ` [PATCH net v2 14/14] net: pse-pd: pd692x0: defer probe while a manager supply is unresolved Carlo Szelinsky
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