On Wed, 2021-08-11 at 11:59 -0700, Jakub Kicinski wrote:
> Since commit 39850ed51062 ("PCI/PTM: Save/restore Precision
> Time Measurement Capability for suspend/resume") devices
> which 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.
Ack. Thanks.
>
> Fixes: 39850ed51062 ("PCI/PTM: Save/restore Precision Time
> Measurement Capability for suspend/resume")
> Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
> ---
> 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);
