From ff3a52ab9cab01a53b168dc667fe789f56b90aa9 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <kuba@kernel.org>
Date: Wed, 11 Aug 2021 11:59:55 -0700
Subject: [PATCH] PCI/PTM: Remove error message at boot
Git-commit: ff3a52ab9cab01a53b168dc667fe789f56b90aa9
Patch-mainline: v5.15-rc1
References: git-fixes stable-5.14.7

Since 39850ed51062 ("PCI/PTM: Save/restore Precision Time Measurement
Capability for suspend/resume"), devices that have PTM capability but
don't enable it see this message on calls to pci_save_state():

  no suspend buffer for PTM

Drop the message, it's perfectly fine not to use a capability.

Fixes: 39850ed51062 ("PCI/PTM: Save/restore Precision Time Measurement Capability for suspend/resume")
Link: https://lore.kernel.org/r/20210811185955.3112534-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: David E. Box <david.e.box@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/pci/pcie/ptm.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/pci/pcie/ptm.c b/drivers/pci/pcie/ptm.c
index 95d4eef2c9e8..4810faa67f52 100644
--- a/drivers/pci/pcie/ptm.c
+++ b/drivers/pci/pcie/ptm.c
@@ -60,10 +60,8 @@ void pci_save_ptm_state(struct pci_dev *dev)
 		return;
 
 	save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_PTM);
-	if (!save_state) {
-		pci_err(dev, "no suspend buffer for PTM\n");
+	if (!save_state)
 		return;
-	}
 
 	cap = (u16 *)&save_state->cap.data[0];
 	pci_read_config_word(dev, ptm + PCI_PTM_CTRL, cap);
-- 
2.26.2