[PATCH v9 05/14] powerpc/eeh: Rely on `link_active_reporting'

Maciej W. Rozycki
2023-06-11T17:19:57Z

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>
---
NB this has been compile-tested only with a PPC64LE configuration.

No change from v8.

Changes from v7:

- Reorder from 4/7.

No change from v6.

New change in v6.
---
arch/powerpc/kernel/eeh_pe.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

linux-pcie-link-active-reporting-eeh.diff
Index: linux-macro/arch/powerpc/kernel/eeh_pe.c
===================================================================
--- linux-macro.orig/arch/powerpc/kernel/eeh_pe.c
+++ linux-macro/arch/powerpc/kernel/eeh_pe.c
@@ -671,9 +671,8 @@ static void eeh_bridge_check_link(struct
eeh_ops->write_config(edev, cap + PCI_EXP_LNKCTL, 2, val);

/* Check link */
- eeh_ops->read_config(edev, cap + PCI_EXP_LNKCAP, 4, &val);
- if (!(val & PCI_EXP_LNKCAP_DLLLARC)) {
- eeh_edev_dbg(edev, "No link reporting capability (0x%08x) \n", val);
+ if (!edev->pdev->link_active_reporting) {
+ eeh_edev_dbg(edev, "No link reporting capability\n");
msleep(1000);
return;
}