linux-kernel - Re: [PATCH 4/4] PCI/hotplug: Don't enabled HPIE in poll mode

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Message-ID: <Z9VrITX60AJ3o60V@wunner.de>
Date: Sat, 15 Mar 2025 12:57:21 +0100
From: Lukas Wunner <lukas@...ner.de>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	Guenter Roeck <groeck@...iper.net>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Rajat Jain <rajatxjain@...il.com>,
	Joel Mathew Thomas <proxy0@...amail.com>,
	linux-kernel@...r.kernel.org,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH 4/4] PCI/hotplug: Don't enabled HPIE in poll mode

On Thu, Mar 13, 2025 at 04:23:33PM +0200, Ilpo Järvinen wrote:
> PCIe hotplug can operate in poll mode without interrupt handlers using
> a polling kthread only. The commit eb34da60edee ("PCI: pciehp: Disable
> hotplug interrupt during suspend") failed to consider that and enables
> HPIE (Hot-Plug Interrupt Enable) unconditionally when resuming the
> Port.
> 
> Only set HPIE if non-poll mode is in use. This makes
> pcie_enable_interrupt() match how pcie_enable_notification() already
> handles HPIE.
> 
> Fixes: eb34da60edee ("PCI: pciehp: Disable hotplug interrupt during suspend")
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

Reviewed-by: Lukas Wunner <lukas@...ner.de>

There's a typo in the subject line (s/enabled/enable/).

This patch does not depend on the preceding patches in the series
and can be applied by itself.

Thanks,

Lukas