2 files changed, 11 insertions, 8 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 7cc8281e70119b..15d50c08907037 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -830,7 +830,6 @@ static void pcie_aspm_override_default_link_state(struct pcie_link_state *link)
 static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist)
 {
 	struct pci_dev *child = link->downstream, *parent = link->pdev;
-	u32 parent_lnkcap, child_lnkcap;
 	u16 parent_lnkctl, child_lnkctl;
 	struct pci_bus *linkbus = parent->subordinate;
 
@@ -845,9 +844,8 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist)
 	 * If ASPM not supported, don't mess with the clocks and link,
 	 * bail out now.
 	 */
-	pcie_capability_read_dword(parent, PCI_EXP_LNKCAP, &parent_lnkcap);
-	pcie_capability_read_dword(child, PCI_EXP_LNKCAP, &child_lnkcap);
-	if (!(parent_lnkcap & child_lnkcap & PCI_EXP_LNKCAP_ASPMS))
+	if (!(parent->aspm_l0s_support && child->aspm_l0s_support) &&
+	    !(parent->aspm_l1_support && child->aspm_l1_support))
 		return;
 
 	/* Configure common clock before checking latencies */
@@ -859,8 +857,6 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist)
 	 * read-only Link Capabilities may change depending on common clock
 	 * configuration (PCIe r5.0, sec 7.5.3.6).
 	 */
-	pcie_capability_read_dword(parent, PCI_EXP_LNKCAP, &parent_lnkcap);
-	pcie_capability_read_dword(child, PCI_EXP_LNKCAP, &child_lnkcap);
 	pcie_capability_read_word(parent, PCI_EXP_LNKCTL, &parent_lnkctl);
 	pcie_capability_read_word(child, PCI_EXP_LNKCTL, &child_lnkctl);
 
@@ -880,7 +876,7 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist)
 	 * given link unless components on both sides of the link each
 	 * support L0s.
 	 */
-	if (parent_lnkcap & child_lnkcap & PCI_EXP_LNKCAP_ASPM_L0S)
+	if (parent->aspm_l0s_support && child->aspm_l0s_support)
 		link->aspm_support |= PCIE_LINK_STATE_L0S;
 
 	if (child_lnkctl & PCI_EXP_LNKCTL_ASPM_L0S)
@@ -889,7 +885,7 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist)
 		link->aspm_enabled |= PCIE_LINK_STATE_L0S_DW;
 
 	/* Setup L1 state */
-	if (parent_lnkcap & child_lnkcap & PCI_EXP_LNKCAP_ASPM_L1)
+	if (parent->aspm_l1_support && child->aspm_l1_support)
 		link->aspm_support |= PCIE_LINK_STATE_L1;
 
 	if (parent_lnkctl & child_lnkctl & PCI_EXP_LNKCTL_ASPM_L1)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index c83e75a0ec1263..de72ceaea28562 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1663,6 +1663,13 @@ void set_pcie_port_type(struct pci_dev *pdev)
 	if (reg32 & PCI_EXP_LNKCAP_DLLLARC)
 		pdev->link_active_reporting = 1;
 
+#ifdef CONFIG_PCIEASPM
+	if (reg32 & PCI_EXP_LNKCAP_ASPM_L0S)
+		pdev->aspm_l0s_support = 1;
+	if (reg32 & PCI_EXP_LNKCAP_ASPM_L1)
+		pdev->aspm_l1_support = 1;
+#endif
+
 	parent = pci_upstream_bridge(pdev);
 	if (!parent)
 		return;