linux-kernel - [PATCH] iwlwifi: pcie: support shutdown operation

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Message-ID: <20251231015739.46024-1-me@linux.beauty>
Date: Wed, 31 Dec 2025 09:57:36 +0800
From: Li Chen <me@...ux.beauty>
To: Miri Korenblit <miriam.rachel.korenblit@...el.com>,
	Johannes Berg <johannes.berg@...el.com>,
	Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
	Yedidya Benshimol <yedidya.ben.shimol@...el.com>,
	linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Li Chen <me@...ux.beauty>
Subject: [PATCH] iwlwifi: pcie: support shutdown operation

Kexec reboot does not reset PCI devices. If iwlwifi is left running,
the next kernel can time out during probe, breaking networking after
kexec:
kernel: iwlwifi 0000:06:00.0: Host monitor block 0x22 vector 0x0
kernel: iwlwifi 0000:06:00.0:     value [iter 0]: 0x00000000
kernel: iwlwifi 0000:06:00.0: probe with driver iwlwifi failed with error -110

Register iwl_pci_remove() as the PCI shutdown callback so the driver
runs its normal teardown path before handing control to the next kernel.

Signed-off-by: Li Chen <me@...ux.beauty>
---
 drivers/net/wireless/intel/iwlwifi/pcie/drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/drv.c b/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
index dc99e7ac4726..c6d4079f7e1a 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
@@ -1325,6 +1325,7 @@ static struct pci_driver iwl_pci_driver = {
 	.id_table = iwl_hw_card_ids,
 	.probe = iwl_pci_probe,
 	.remove = iwl_pci_remove,
+	.shutdown = iwl_pci_remove,
 	.driver.pm = IWL_PM_OPS,
 	.driver.coredump = iwl_pci_dump,
 };
-- 
2.52.0