From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 4.19 27/49] i2c: mlxcpld: Fix wrong initialization order in probe Date: Sat, 8 Jun 2019 07:42:08 -0400 Message-ID: <20190608114232.8731-27-sashal@kernel.org> References: <20190608114232.8731-1-sashal@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190608114232.8731-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Vadim Pasternak , Wolfram Sang , stable@kernel.org, Sasha Levin , linux-i2c@vger.kernel.org List-Id: linux-i2c@vger.kernel.org From: Vadim Pasternak [ 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 Signed-off-by: Wolfram Sang Cc: stable@kernel.org Signed-off-by: Sasha Levin --- 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