PCI/ASPM: Remove unused lists from struct pcie_link_state

ASPM does not make use of the children or link LIST_HEADs declared in
struct pcie_link_state and defined in alloc_pcie_link_state().  Therefore,
remove these lists.

No functional change intended.

Signed-off-by: Frederick Lawler <fred@fredlawl.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index dcb29cb..2330ebf 100644 (file)
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -53,8 +53,6 @@ struct pcie_link_state {
        struct pcie_link_state *root;   /* pointer to the root port link */
        struct pcie_link_state *parent; /* pointer to the parent Link state */
        struct list_head sibling;       /* node in link_list */
-       struct list_head children;      /* list of child link states */
-       struct list_head link;          /* node in parent's children list */
 
        /* ASPM state */
        u32 aspm_support:7;             /* Supported ASPM state */
@@ -850,8 +848,6 @@ static struct pcie_link_state *alloc_pcie_link_state(struct pci_dev *pdev)
                return NULL;
 
        INIT_LIST_HEAD(&link->sibling);
-       INIT_LIST_HEAD(&link->children);
-       INIT_LIST_HEAD(&link->link);
        link->pdev = pdev;
        link->downstream = pci_function_0(pdev->subordinate);
 
@@ -877,7 +873,6 @@ static struct pcie_link_state *alloc_pcie_link_state(struct pci_dev *pdev)
 
                link->parent = parent;
                link->root = link->parent->root;
-               list_add(&link->link, &parent->children);
        }
 
        list_add(&link->sibling, &link_list);
@@ -1001,7 +996,6 @@ void pcie_aspm_exit_link_state(struct pci_dev *pdev)
        /* All functions are removed, so just disable ASPM for the link */
        pcie_config_aspm_link(link, 0);
        list_del(&link->sibling);
-       list_del(&link->link);
        /* Clock PM is for endpoint device */
        free_link_state(link);