[PATCH] phy: fsl-lynx-28g: propagate PCVT enable errors

[Vladimir Oltean]

Hi Surendra,

On Wed, Jul 22, 2026 at 09:06:19AM +0530, kr494167 at gmail.com wrote:
> From: surendra <kr494167 at gmail.com>
> 
> lynx_28g_set_mode() currently ignores failures from
> lynx_28g_lane_enable_pcvt(). It then updates the lane mode and reports
> success even though the protocol converter may remain disabled.
> 
> Propagate the error and leave the previous lane mode intact so the caller
> can handle the failed reconfiguration.
> 
> Fixes: 8f73b37cf3fb ("phy: add support for the Layerscape SerDes 28G")
> Signed-off-by: surendra <kr494167 at gmail.com>
> ---
>  drivers/phy/freescale/phy-fsl-lynx-28g.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/phy/freescale/phy-fsl-lynx-28g.c b/drivers/phy/freescale/phy-fsl-lynx-28g.c
> index 38afcd081a2a..1fe406adc83c 100644
> --- a/drivers/phy/freescale/phy-fsl-lynx-28g.c
> +++ b/drivers/phy/freescale/phy-fsl-lynx-28g.c
> @@ -1003,7 +1003,9 @@ static int lynx_28g_set_mode(struct phy *phy, enum phy_mode mode, int submode)
> 
>         lynx_28g_lane_change_proto_conf(lane, lane_mode);
>         lynx_28g_lane_remap_pll(lane, lane_mode);
> -       WARN_ON(lynx_28g_lane_enable_pcvt(lane, lane_mode));
> +       err = lynx_28g_lane_enable_pcvt(lane, lane_mode);
> +       if (err)
> +               goto out;
> 
>         lane->mode = lane_mode;
> 
> --
> 2.55.0
>

Did you draw any conclusions from the feedback you received on the
lynx-10g patch and decided that it doesn't apply to lynx-28g?
https://lore.kernel.org/linux-phy/20260720101906.80584-1-kr494167@gmail.com/

Hint: it does.