target/linux/layerscape/patches-5.4/701-net-0348-staging-fsl-dpaa2-mac-reverse-order-of-handling-stop.patch

   1 From c9db7ecdd08e38fb1af207c2a7e810b4bd0d1043 Mon Sep 17 00:00:00 2001
   2 From: Ioana Ciornei <ioana.ciornei@nxp.com>
   3 Date: Wed, 11 Dec 2019 17:06:40 +0200
   4 Subject: [PATCH] staging: fsl-dpaa2/mac: reverse order of handling stop/start
   5  IRQs
   6
   7 Both the LINK_UP_REQ and the LINK_DOWN_REQ IRQs can be received in the
   8 same time when a reset is performed on the DPMAC's partner.
   9 Handle first the link down and then the link up so that we do not
  10 trigger a phylib WARNING like the following:
  11
  12 [  446.272011] called from state NOLINK
  13 [  446.275604] WARNING: CPU: 0 PID: 473 at drivers/net/phy/phy.c:874
  14 phy_start+0x44/0xa8
  15
  16 Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
  17 ---
  18  drivers/staging/fsl-dpaa2/mac/mac.c | 5 ++---
  19  1 file changed, 2 insertions(+), 3 deletions(-)
  20
  21 --- a/drivers/staging/fsl-dpaa2/mac/mac.c
  22 +++ b/drivers/staging/fsl-dpaa2/mac/mac.c
  23 @@ -482,12 +482,11 @@ static irqreturn_t dpaa2_mac_irq_handler
  24                 configure_link(priv, &link_cfg);
  25         }
  26
  27 -       if (status & DPMAC_IRQ_EVENT_LINK_UP_REQ)
  28 -               phy_start(ndev->phydev);
  29 -
  30         if (status & DPMAC_IRQ_EVENT_LINK_DOWN_REQ)
  31                 phy_stop(ndev->phydev);
  32
  33 +       if (status & DPMAC_IRQ_EVENT_LINK_UP_REQ)
  34 +               phy_start(ndev->phydev);
  35  out:
  36         dpmac_clear_irq_status(mc_dev->mc_io, 0, mc_dev->mc_handle,
  37                                DPMAC_IRQ_INDEX, status);