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PCI/ACPI: Fix pci_acpi_preserve_config() memory leak 

pci_acpi_preserve_config() leaks memory by returning early without freeing
the ACPI object on success. Fix that by always freeing the obj, which is
not needed by the caller.

Fixes: 9d7d5db8e7 ("PCI: Move PRESERVE_BOOT_CONFIG _DSM evaluation to pci_register_host_bridge()")
Signed-off-by: Nirmoy Das <nirmoyd@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20250825214642.142135-1-nirmoyd@nvidia.com
This commit is contained in:
Nirmoy Das 2025-08-25 14:46:42 -07:00 committed by Bjorn Helgaas
parent 8f5ae30d69
commit fac679df75
1 changed files with 4 additions and 2 deletions
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6
drivers/pci/pci-acpi.c
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@ -122,6 +122,8 @@ phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
bool pci_acpi_preserve_config(struct pci_host_bridge *host_bridge)
{
bool ret = false;
if (ACPI_HANDLE(&host_bridge->dev)) {
union acpi_object *obj;
@ -135,11 +137,11 @@ bool pci_acpi_preserve_config(struct pci_host_bridge *host_bridge)
1, DSM_PCI_PRESERVE_BOOT_CONFIG,
NULL, ACPI_TYPE_INTEGER);
if (obj && obj->integer.value == 0)
return true;
ret = true;
ACPI_FREE(obj);
}
return false;
return ret;
}
/* _HPX PCI Setting Record (Type 0); same as _HPP */