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| author |   Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2019-06-18 22:39:27 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-06-19 17:40:49 -0400 |
| commit | 84ce4d0f9f55b4f4ca4d4edcbb54a23d9dad1aae (patch) | |
| tree | 799526c7d6ed8338c67c2fa2b4cb5c58c3f785c8 /drivers/net/ethernet/stmicro | |
| parent | selftests/net: make udpgso_bench skip unsupported testcases (diff) | |
| download | linux-dev-84ce4d0f9f55b4f4ca4d4edcbb54a23d9dad1aae.tar.xz linux-dev-84ce4d0f9f55b4f4ca4d4edcbb54a23d9dad1aae.zip | |
net: stmmac: initialize the reset delay array
Commit ce4ab73ab0c27c ("net: stmmac: drop the reset delays from struct
stmmac_mdio_bus_data") moved the reset delay array from struct
stmmac_mdio_bus_data to a stack variable.
The values from the array inside struct stmmac_mdio_bus_data were
previously initialized to 0 because the struct was allocated using
devm_kzalloc(). The array on the stack has to be initialized
explicitly, else we might be reading garbage values.
Initialize all reset delays to 0 to ensure that the values are 0 if the
"snps,reset-delays-us" property is not defined.
This fixes booting at least two boards (MIPS pistachio marduk and ARM
sun8i H2+ Orange Pi Zero). These are hanging during boot when
initializing the stmmac Ethernet controller (as found by Kernel CI).
Both have in common that they don't define the "snps,reset-delays-us"
property.
Fixes: ce4ab73ab0c27c ("net: stmmac: drop the reset delays from struct stmmac_mdio_bus_data")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c index 5b7923c0698c..f8061e34122f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c @@ -241,7 +241,7 @@ int stmmac_mdio_reset(struct mii_bus *bus) #ifdef CONFIG_OF if (priv->device->of_node) { struct gpio_desc *reset_gpio; - u32 delays[3]; + u32 delays[3] = { 0, 0, 0 }; int ret; reset_gpio = devm_gpiod_get_optional(priv->device, |