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PCI ASPM: cleanup pcie_aspm_sanity_check 

Minor cleanup for pcie_aspm_sanity_check().

Acked-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Kenji Kaneshige 2009-05-13 12:23:09 +09:00 committed by Jesse Barnes
parent efdf828881
commit 3647584d9e
1 changed files with 9 additions and 12 deletions
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21
drivers/pci/pcie/aspm.c
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@ -552,27 +552,24 @@ static void free_link_state(struct pcie_link_state *link)
static int pcie_aspm_sanity_check(struct pci_dev *pdev)
{
struct pci_dev *child_dev;
int child_pos;
struct pci_dev *child;
int pos;
u32 reg32;
/*
* Some functions in a slot might not all be PCIE functions, very
* strange. Disable ASPM for the whole slot
* Some functions in a slot might not all be PCIE functions,
* very strange. Disable ASPM for the whole slot
*/
list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) {
child_pos = pci_find_capability(child_dev, PCI_CAP_ID_EXP);
if (!child_pos)
list_for_each_entry(child, &pdev->subordinate->devices, bus_list) {
pos = pci_find_capability(child, PCI_CAP_ID_EXP);
if (!pos)
return -EINVAL;
/*
* Disable ASPM for pre-1.1 PCIe device, we follow MS to use
* RBER bit to determine if a function is 1.1 version device
*/
pci_read_config_dword(child_dev, child_pos + PCI_EXP_DEVCAP,
&reg32);
pci_read_config_dword(child, pos + PCI_EXP_DEVCAP, &reg32);
if (!(reg32 & PCI_EXP_DEVCAP_RBER) && !aspm_force) {
dev_printk(KERN_INFO, &child_dev->dev, "disabling ASPM"
dev_printk(KERN_INFO, &child->dev, "disabling ASPM"
" on pre-1.1 PCIe device. You can enable it"
" with 'pcie_aspm=force'\n");
return -EINVAL;