Hello.
A formal patch review this time...
On 05/24/2018 02:11 PM, Vladimir Zapolskiy wrote:
> The change fixes a sleep in atomic context issue, which can be
> always triggered by running 'ethtool -r' command, because
> phy_start_aneg() protects phydev fields by a mutex.
OK so far...
> Another note is that the change implicitly replaces phy_start_aneg()
> with a newer phy_restart_aneg().
Why? Is this necessary to fix the BUG()?
> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@xxxxxxxxxx>
> ---
> drivers/net/ethernet/renesas/ravb_main.c | 17 +----------------
> 1 file changed, 1 insertion(+), 16 deletions(-)
>
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 68f122140966..4a043eb0e2aa 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -1150,21 +1150,6 @@ static int ravb_set_link_ksettings(struct net_device *ndev,
> return error;
> }
>
> -static int ravb_nway_reset(struct net_device *ndev)
> -{
> - struct ravb_private *priv = netdev_priv(ndev);
> - int error = -ENODEV;
> - unsigned long flags;
> -
> - if (ndev->phydev) {
> - spin_lock_irqsave(&priv->lock, flags);
OK, removing spin_lock_irqsave() fixes the BUG()...
Not sure what we rotect against here anyway, MAC interrupts?
> - error = phy_start_aneg(ndev->phydev);
> - spin_unlock_irqrestore(&priv->lock, flags);
> - }
> -
> - return error;
> -}
> -
> static u32 ravb_get_msglevel(struct net_device *ndev)
> {
> struct ravb_private *priv = netdev_priv(ndev);
> @@ -1377,7 +1362,7 @@ static int ravb_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
> }
>
> static const struct ethtool_ops ravb_ethtool_ops = {
> - .nway_reset = ravb_nway_reset,
> + .nway_reset = phy_ethtool_nway_reset,
What does this fix?
> .get_msglevel = ravb_get_msglevel,
> .set_msglevel = ravb_set_msglevel,
> .get_link = ethtool_op_get_link,
MBR, Sergei
