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);