linux-kernel - [PATCH v2 1/4] PCI: Keep AER status in pci_restore

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Date:   Thu, 20 Apr 2023 09:58:27 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     bhelgaas@...gle.com
Cc:     mika.westerberg@...ux.intel.com, koba.ko@...onical.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/4] PCI: Keep AER status in pci_restore_state()

When AER is using the same IRQ as PME, AER interrupt is treated as a
wakeup event and it can disrupt system suspend process.

If that happens, the system will report it's woken up by PME IRQ without
indicating any AER error since AER status is cleared on resume.

So keep the AER status so users can know the system is woken up by AER
instead of PME.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
v2:
 - New patch.

 drivers/pci/pci.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 7a67611dc5f4..71aead00fc20 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1778,7 +1778,6 @@ void pci_restore_state(struct pci_dev *dev)
 	pci_restore_dpc_state(dev);
 	pci_restore_ptm_state(dev);
 
-	pci_aer_clear_status(dev);
 	pci_restore_aer_state(dev);
 
 	pci_restore_config_space(dev);
-- 
2.34.1