diff options
| author | Zhe Qiao <qiaozhe@iscas.ac.cn> | 2025-04-30 14:06:03 +0800 |
|---|---|---|
| committer | Krzysztof Wilczyński <kwilczynski@kernel.org> | 2025-05-22 11:00:03 +0000 |
| commit | 631b2af2f35737750af284be22e63da56bf20139 (patch) | |
| tree | cc5b7bdc59559230fe4ab731aa834ef4bfa5349a | |
| parent | 0af2f6be1b4281385b618cb86ad946eded089ac8 (diff) | |
PCI/ACPI: Fix allocated memory release on error in pci_acpi_scan_root()
In the pci_acpi_scan_root() function, when creating a PCI bus fails,
we need to free up the previously allocated memory, which can avoid
invalid memory usage and save resources.
Fixes: 789befdfa389 ("arm64: PCI: Migrate ACPI related functions to pci-acpi.c")
Signed-off-by: Zhe Qiao <qiaozhe@iscas.ac.cn>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20250430060603.381504-1-qiaozhe@iscas.ac.cn
| -rw-r--r-- | drivers/pci/pci-acpi.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index af370628e583..b78e0e417324 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -1676,24 +1676,19 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) return NULL; root_ops = kzalloc(sizeof(*root_ops), GFP_KERNEL); - if (!root_ops) { - kfree(ri); - return NULL; - } + if (!root_ops) + goto free_ri; ri->cfg = pci_acpi_setup_ecam_mapping(root); - if (!ri->cfg) { - kfree(ri); - kfree(root_ops); - return NULL; - } + if (!ri->cfg) + goto free_root_ops; root_ops->release_info = pci_acpi_generic_release_info; root_ops->prepare_resources = pci_acpi_root_prepare_resources; root_ops->pci_ops = (struct pci_ops *)&ri->cfg->ops->pci_ops; bus = acpi_pci_root_create(root, root_ops, &ri->common, ri->cfg); if (!bus) - return NULL; + goto free_cfg; /* If we must preserve the resource configuration, claim now */ host = pci_find_host_bridge(bus); @@ -1710,6 +1705,14 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) pcie_bus_configure_settings(child); return bus; + +free_cfg: + pci_ecam_free(ri->cfg); +free_root_ops: + kfree(root_ops); +free_ri: + kfree(ri); + return NULL; } void pcibios_add_bus(struct pci_bus *bus) |