target/linux/mvebu/patches-4.14/405-net-mvneta-disable-MVNETA_CAUSE_PSC_SYNC_CHANGE-inte.patch

   1 From fde9e742a47606110232b7464608b6f9c0510938 Mon Sep 17 00:00:00 2001
   2 From: Russell King <rmk+kernel@armlinux.org.uk>
   3 Date: Sat, 24 Dec 2016 10:27:08 +0000
   4 Subject: net: mvneta: disable MVNETA_CAUSE_PSC_SYNC_CHANGE interrupt
   5
   6 The PSC sync change interrupt can fire multiple times while the link is
   7 down.  As this isn't information we make use of, it's pointless having
   8 the interrupt enabled, so let's disable this interrupt.
   9
  10 Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
  11 ---
  12  drivers/net/ethernet/marvell/mvneta.c | 12 ++++--------
  13  1 file changed, 4 insertions(+), 8 deletions(-)
  14
  15 --- a/drivers/net/ethernet/marvell/mvneta.c
  16 +++ b/drivers/net/ethernet/marvell/mvneta.c
  17 @@ -2705,8 +2705,7 @@ static int mvneta_poll(struct napi_struc
  18                 mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0);
  19
  20                 if (cause_misc & (MVNETA_CAUSE_PHY_STATUS_CHANGE |
  21 -                                 MVNETA_CAUSE_LINK_CHANGE |
  22 -                                 MVNETA_CAUSE_PSC_SYNC_CHANGE))
  23 +                                 MVNETA_CAUSE_LINK_CHANGE))
  24                         mvneta_link_change(pp);
  25         }
  26
  27 @@ -3044,8 +3043,7 @@ static void mvneta_start_dev(struct mvne
  28
  29         mvreg_write(pp, MVNETA_INTR_MISC_MASK,
  30                     MVNETA_CAUSE_PHY_STATUS_CHANGE |
  31 -                   MVNETA_CAUSE_LINK_CHANGE |
  32 -                   MVNETA_CAUSE_PSC_SYNC_CHANGE);
  33 +                   MVNETA_CAUSE_LINK_CHANGE);
  34
  35         phylink_start(pp->phylink);
  36         netif_tx_start_all_queues(pp->dev);
  37 @@ -3541,8 +3539,7 @@ static int mvneta_cpu_online(unsigned in
  38         on_each_cpu(mvneta_percpu_unmask_interrupt, pp, true);
  39         mvreg_write(pp, MVNETA_INTR_MISC_MASK,
  40                     MVNETA_CAUSE_PHY_STATUS_CHANGE |
  41 -                   MVNETA_CAUSE_LINK_CHANGE |
  42 -                   MVNETA_CAUSE_PSC_SYNC_CHANGE);
  43 +                   MVNETA_CAUSE_LINK_CHANGE);
  44         netif_tx_start_all_queues(pp->dev);
  45         spin_unlock(&pp->lock);
  46         return 0;
  47 @@ -3583,8 +3580,7 @@ static int mvneta_cpu_dead(unsigned int
  48         on_each_cpu(mvneta_percpu_unmask_interrupt, pp, true);
  49         mvreg_write(pp, MVNETA_INTR_MISC_MASK,
  50                     MVNETA_CAUSE_PHY_STATUS_CHANGE |
  51 -                   MVNETA_CAUSE_LINK_CHANGE |
  52 -                   MVNETA_CAUSE_PSC_SYNC_CHANGE);
  53 +                   MVNETA_CAUSE_LINK_CHANGE);
  54         netif_tx_start_all_queues(pp->dev);
  55         return 0;
  56  }