diff mbox series

[v2,2/2] PCI: Small clarification to the intent of LT wait

Message ID 20240423130820.43824-2-ilpo.jarvinen@linux.intel.com (mailing list archive)
State Accepted
Delegated to: Bjorn Helgaas
Headers show
Series [v2,1/2] PCI: Use the correct bit in Link Training not active check | expand

Commit Message

Ilpo Järvinen April 23, 2024, 1:08 p.m. UTC 
Make a small clarification into the comment relating to the LT wait and
the purpose of the check that implements the implementation note in
PCIe r6.1 sec 7.5.3.7.

Suggested-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---

v2:
- New patch
---
 drivers/pci/pci.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 70b8c87055cb..5a25facb3ce7 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4625,9 +4625,10 @@  int pcie_retrain_link(struct pci_dev *pdev, bool use_lt)
 
 	/*
 	 * Ensure the updated LNKCTL parameters are used during link
-	 * training by checking that there is no ongoing link training to
-	 * avoid LTSSM race as recommended in Implementation Note at the
-	 * end of PCIe r6.0.1 sec 7.5.3.7.
+	 * training by checking that there is no ongoing link training that
+	 * may have started before link parameters were changed, so as to
+	 * avoid LTSSM race as recommended in Implementation Note at the end
+	 * of PCIe r6.1 sec 7.5.3.7.
 	 */
 	rc = pcie_wait_for_link_status(pdev, true, false);
 	if (rc)