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PCI: pciehp: Don't enable HPIE when resuming in poll mode

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PCIe hotplug can operate in poll mode without interrupt handlers using a
polling kthread only.  eb34da60ed ("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.

Link: https://lore.kernel.org/r/20250321162114.3939-1-ilpo.jarvinen@linux.intel.com
Fixes: eb34da60ed ("PCI: pciehp: Disable hotplug interrupt during suspend")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
This commit is contained in:
Ilpo Järvinen 2025-03-21 18:21:14 +02:00 committed by Bjorn Helgaas
parent e3260237aa
commit 527664f738
1 changed files with 3 additions and 1 deletions
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4
drivers/pci/hotplug/pciehp_hpc.c
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@ -842,7 +842,9 @@ void pcie_enable_interrupt(struct controller *ctrl)
{
u16 mask;
mask = PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_DLLSCE;
mask = PCI_EXP_SLTCTL_DLLSCE;
if (!pciehp_poll_mode)
mask |= PCI_EXP_SLTCTL_HPIE;
pcie_write_cmd(ctrl, mask, mask);
}