Re: [PATCH] NTB: epf: log teardown command failures with error code

[Dave Jiang <dave.jiang@intel.com>]

On 4/7/26 10:49 PM, Alok Tiwari wrote:
> ntb_epf_mw_clear_trans() initializes ret to 0 and never updates it, so it
> ignores failures from ntb_epf_send_command() and always returns 0.
> Capture the command status, return it to the caller, and log the MW index
> and error code on failure.
> 
> Fixes: 812ce2f8d14e ("NTB: Add support for EPF PCI Non-Transparent Bridge")
> Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>

Reviewed-by: Dave Jiang <dave.jiang@intel.com>


> ---
>  drivers/ntb/hw/epf/ntb_hw_epf.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/ntb/hw/epf/ntb_hw_epf.c b/drivers/ntb/hw/epf/ntb_hw_epf.c
> index d3ecf25a5162..0c8fc459eb7a 100644
> --- a/drivers/ntb/hw/epf/ntb_hw_epf.c
> +++ b/drivers/ntb/hw/epf/ntb_hw_epf.c
> @@ -438,11 +438,11 @@ static int ntb_epf_mw_clear_trans(struct ntb_dev *ntb, int pidx, int idx)
>  {
>  	struct ntb_epf_dev *ndev = ntb_ndev(ntb);
>  	struct device *dev = ndev->dev;
> -	int ret = 0;
> +	int ret;
>  
> -	ntb_epf_send_command(ndev, CMD_TEARDOWN_MW, idx);
> +	ret = ntb_epf_send_command(ndev, CMD_TEARDOWN_MW, idx);
>  	if (ret)
> -		dev_err(dev, "Failed to teardown memory window\n");
> +		dev_err(dev, "Failed to teardown memory window %d err %d\n", idx, ret);
>  
>  	return ret;
>  }