From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/pci/hotplug/pciehp_pci.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/kernel/drivers/pci/hotplug/pciehp_pci.c b/kernel/drivers/pci/hotplug/pciehp_pci.c
index d17f3bf..ad12515 100644
--- a/kernel/drivers/pci/hotplug/pciehp_pci.c
+++ b/kernel/drivers/pci/hotplug/pciehp_pci.c
@@ -63,7 +63,14 @@
pci_assign_unassigned_bridge_resources(bridge);
pcie_bus_configure_settings(parent);
+
+ /*
+ * Release reset_lock during driver binding
+ * to avoid AB-BA deadlock with device_lock.
+ */
+ up_read(&ctrl->reset_lock);
pci_bus_add_devices(parent);
+ down_read_nested(&ctrl->reset_lock, ctrl->depth);
out:
pci_unlock_rescan_remove();
@@ -104,7 +111,15 @@
list_for_each_entry_safe_reverse(dev, temp, &parent->devices,
bus_list) {
pci_dev_get(dev);
+
+ /*
+ * Release reset_lock during driver unbinding
+ * to avoid AB-BA deadlock with device_lock.
+ */
+ up_read(&ctrl->reset_lock);
pci_stop_and_remove_bus_device(dev);
+ down_read_nested(&ctrl->reset_lock, ctrl->depth);
+
/*
* Ensure that no new Requests will be generated from
* the device.
--
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