target/linux/bcm4908/patches-5.4/070-v5.10-0002-net-dsa-b53-Print-err-message-on-SW_RST-timeout.patch

   1 From 434d2312cd8057aa6972f2b39aa0b359d02af9f4 Mon Sep 17 00:00:00 2001
   2 From: Paul Barker <pbarker@konsulko.com>
   3 Date: Thu, 3 Sep 2020 12:26:21 +0100
   4 Subject: [PATCH] net: dsa: b53: Print err message on SW_RST timeout
   5
   6 This allows us to differentiate between the possible failure modes of
   7 b53_switch_reset() by looking at the dmesg output.
   8
   9 Signed-off-by: Paul Barker <pbarker@konsulko.com>
  10 Acked-by: Florian Fainelli <f.fainelli@gmail.com>
  11 Signed-off-by: David S. Miller <davem@davemloft.net>
  12 ---
  13  drivers/net/dsa/b53/b53_common.c | 5 ++++-
  14  1 file changed, 4 insertions(+), 1 deletion(-)
  15
  16 --- a/drivers/net/dsa/b53/b53_common.c
  17 +++ b/drivers/net/dsa/b53/b53_common.c
  18 @@ -755,8 +755,11 @@ static int b53_switch_reset(struct b53_d
  19                         usleep_range(1000, 2000);
  20                 } while (timeout-- > 0);
  21
  22 -               if (timeout == 0)
  23 +               if (timeout == 0) {
  24 +                       dev_err(dev->dev,
  25 +                               "Timeout waiting for SW_RST to clear!\n");
  26                         return -ETIMEDOUT;
  27 +               }
  28         }
  29
  30         b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);