From: Jakub Kicinski kuba@kernel.org
[ Upstream commit ff3a52ab9cab01a53b168dc667fe789f56b90aa9 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- 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);