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Revert "PCI/ACPI: Fix runtime PM ref imbalance on Hot-Plug Capable ports"

Browse source 
This reverts commit 607b342654 which is
commit 6cff20ce3b92ffbf2fc5eb9e5a030b3672aa414a upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I9fa208412f0ceeb38ca3aadc81726f0057917514
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman 2025-09-02 12:08:44 +00:00
commit ede3e90ad9
4 changed files with 6 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/pci/pci-acpi.c
View file

@ -791,11 +791,13 @@ int pci_acpi_program_hp_params(struct pci_dev *dev)
bool pciehp_is_native(struct pci_dev *bridge)
{
const struct pci_host_bridge *host;
u32 slot_cap;
if (!IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE))
return false;
if (!bridge->is_pciehp)
pcie_capability_read_dword(bridge, PCI_EXP_SLTCAP, &slot_cap);
if (!(slot_cap & PCI_EXP_SLTCAP_HPC))
return false;
if (pcie_ports_native)

8
drivers/pci/pci.c
View file

@ -2647,12 +2647,8 @@ static const struct dmi_system_id bridge_d3_blacklist[] = {
* pci_bridge_d3_possible - Is it possible to put the bridge into D3
* @bridge: Bridge to check
*
* Currently we only allow D3 for some PCIe ports and for Thunderbolt.
*
* Return: Whether it is possible to move the bridge to D3.
*
* The return value is guaranteed to be constant across the entire lifetime
* of the bridge, including its hot-removal.
* This function checks if it is possible to move the bridge to D3.
* Currently we only allow D3 for recent enough PCIe ports and Thunderbolt.
*/
bool pci_bridge_d3_possible(struct pci_dev *bridge)
{

2
drivers/pci/probe.c
View file

@ -1479,7 +1479,7 @@ void set_pcie_hotplug_bridge(struct pci_dev *pdev)
pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &reg32);
if (reg32 & PCI_EXP_SLTCAP_HPC)
pdev->is_hotplug_bridge = pdev->is_pciehp = 1;
pdev->is_hotplug_bridge = 1;
}
static void set_pcie_thunderbolt(struct pci_dev *dev)

1
include/linux/pci.h
View file

@ -416,7 +416,6 @@ struct pci_dev {
unsigned int is_virtfn:1;
unsigned int reset_fn:1;
unsigned int is_hotplug_bridge:1;
unsigned int is_pciehp:1;
unsigned int shpc_managed:1; /* SHPC owned by shpchp */
unsigned int is_thunderbolt:1; /* Thunderbolt controller */
/*