Re: [PATCH] pci: ptm: remove error message at boot

[Bjorn Helgaas <helgaas@kernel.org>]

On Wed, Aug 11, 2021 at 11:59:55AM -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.
> 
> Fixes: 39850ed51062 ("PCI/PTM: Save/restore Precision Time Measurement Capability for suspend/resume")
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Applied to pci/misc for v5.15, thanks!

I fixed your subject line to match previous ones and converted David's
informal ack to an actual "Acked-by".

> ---
>  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);
> -- 
> 2.31.1
>