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[v8,1/7] PCI: pciehp: Rely on `link_active_reporting'

Message ID alpine.DEB.2.21.2304060106260.13659@angie.orcam.me.uk (mailing list archive)
State Superseded
Delegated to: Bjorn Helgaas
Headers show
Series pci: Work around ASMedia ASM2824 PCIe link training failures | expand

Commit Message

Maciej W. Rozycki April 6, 2023, 12:21 a.m. UTC 
Use `link_active_reporting' to determine whether Data Link Layer Link 
Active Reporting is available rather than re-retrieving the capability.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
---
NB this has been compile-tested only with PPC64LE and x86-64
configurations.

Changes from v7:

- Add Reviewed-by: tag by Lukas Wunner.

- Reorder from 6/7.

No change from v6.

New change in v6.
---
 drivers/pci/hotplug/pciehp_hpc.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

linux-pcie-link-active-reporting-hpc.diff
diff mbox series

Patch

Index: linux-macro/drivers/pci/hotplug/pciehp_hpc.c
===================================================================
--- linux-macro.orig/drivers/pci/hotplug/pciehp_hpc.c
+++ linux-macro/drivers/pci/hotplug/pciehp_hpc.c
@@ -984,7 +984,7 @@  static inline int pcie_hotplug_depth(str
 struct controller *pcie_init(struct pcie_device *dev)
 {
 	struct controller *ctrl;
-	u32 slot_cap, slot_cap2, link_cap;
+	u32 slot_cap, slot_cap2;
 	u8 poweron;
 	struct pci_dev *pdev = dev->port;
 	struct pci_bus *subordinate = pdev->subordinate;
@@ -1030,9 +1030,6 @@  struct controller *pcie_init(struct pcie
 	if (dmi_first_match(inband_presence_disabled_dmi_table))
 		ctrl->inband_presence_disabled = 1;
 
-	/* Check if Data Link Layer Link Active Reporting is implemented */
-	pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap);
-
 	/* Clear all remaining event bits in Slot Status register. */
 	pcie_capability_write_word(pdev, PCI_EXP_SLTSTA,
 		PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD |
@@ -1051,7 +1048,7 @@  struct controller *pcie_init(struct pcie
 		FLAG(slot_cap, PCI_EXP_SLTCAP_EIP),
 		FLAG(slot_cap, PCI_EXP_SLTCAP_NCCS),
 		FLAG(slot_cap2, PCI_EXP_SLTCAP2_IBPD),
-		FLAG(link_cap, PCI_EXP_LNKCAP_DLLLARC),
+		FLAG(pdev->link_active_reporting, true),
 		pdev->broken_cmd_compl ? " (with Cmd Compl erratum)" : "");
 
 	/*