Thread (10 messages) 10 messages, 2 authors, 2023-02-19
STALE1193d

[PATCH v6 4/7] powerpc/eeh: Rely on `link_active_reporting'

From: "Maciej W. Rozycki" <macro@orcam.me.uk>
Date: 2023-02-05 15:49:43
Also in: linux-pci, linux-rdma, lkml, netdev

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.

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;
 	}
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