[PATCH AUTOSEL 4.19 27/49] i2c: mlxcpld: Fix wrong initialization order in probe

Sasha Levin
2019-06-08T11:44:20Z

From: Vadim Pasternak <vadimp@mellanox.com>

[ Upstream commit 13067ef73f337336e3149f5bb9f3fd05fe7f87a0 ]

Fix wrong order in probing routine initialization - field `base_addr'
is used before it's initialized. Move assignment of 'priv->base_addr`
to the beginning, prior the call to mlxcpld_i2c_read_comm().
Wrong order caused the first read of capability register to be executed
at wrong offset 0x0 instead of 0x2000. By chance it was a "good
garbage" at 0x0 offset.

Fixes: 313ce648b5a4 ("i2c: mlxcpld: Add support for extended transaction length for i2c-mlxcpld")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/i2c/busses/i2c-mlxcpld.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-mlxcpld.c b/drivers/i2c/busses/i2c-mlxcpld.c
index 745ed43a22d6..2fd717d8dd30 100644
--- a/drivers/i2c/busses/i2c-mlxcpld.c
+++ b/drivers/i2c/busses/i2c-mlxcpld.c
@@ -503,6 +503,7 @@ static int mlxcpld_i2c_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, priv);

priv->dev = &pdev->dev;
+ priv->base_addr = MLXPLAT_CPLD_LPC_I2C_BASE_ADDR;

/* Register with i2c layer */
mlxcpld_i2c_adapter.timeout = usecs_to_jiffies(MLXCPLD_I2C_XFER_TO);
@@ -518,7 +519,6 @@ static int mlxcpld_i2c_probe(struct platform_device *pdev)
mlxcpld_i2c_adapter.nr = pdev->id;
priv->adap = mlxcpld_i2c_adapter;
priv->adap.dev.parent = &pdev->dev;
- priv->base_addr = MLXPLAT_CPLD_LPC_I2C_BASE_ADDR;
i2c_set_adapdata(&priv->adap, priv);

err = i2c_add_numbered_adapter(&priv->adap);
--
2.20.1