target/linux/generic/backport-5.15/772-v6.0-net-dsa-qca8k-fix-NULL-pointer-dereference-for-of_de.patch

   1 From 057bcf15db8e625276ddf02b2b7c668a3cb43f81 Mon Sep 17 00:00:00 2001
   2 From: Christian Marangi <ansuelsmth@gmail.com>
   3 Date: Sun, 4 Sep 2022 23:46:24 +0200
   4 Subject: [net PATCH] net: dsa: qca8k: fix NULL pointer dereference for
   5  of_device_get_match_data
   6
   7 of_device_get_match_data is called on priv->dev before priv->dev is
   8 actually set. Move of_device_get_match_data after priv->dev is correctly
   9 set to fix this kernel panic.
  10
  11 Fixes: 3bb0844e7bcd ("net: dsa: qca8k: cache match data to speed up access")
  12 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
  13 ---
  14  drivers/net/dsa/qca/qca8k-8xxx.c | 2 +-
  15  1 file changed, 1 insertion(+), 1 deletion(-)
  16
  17 --- a/drivers/net/dsa/qca/qca8k-8xxx.c
  18 +++ b/drivers/net/dsa/qca/qca8k-8xxx.c
  19 @@ -1835,9 +1835,9 @@ qca8k_sw_probe(struct mdio_device *mdiod
  20         if (!priv)
  21                 return -ENOMEM;
  22
  23 -       priv->info = of_device_get_match_data(priv->dev);
  24         priv->bus = mdiodev->bus;
  25         priv->dev = &mdiodev->dev;
  26 +       priv->info = of_device_get_match_data(priv->dev);
  27
  28         priv->reset_gpio = devm_gpiod_get_optional(priv->dev, "reset",
  29                                                    GPIOD_ASIS);