[PATCH] i2c: axxia: enable clock before calling clk_get_rate()

[Tobias Jordan]

axxia_i2c_init() uses clk_get_rate() for idev->i2c_clk. clk_get_rate()
should only be called if the clock is enabled, so ensure that by moving
the clk_prepare_enable() call before the call to axxia_i2c_init().

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 08678b850cd0 ("i2c: axxia: Add I2C driver for AXM55xx")
Signed-off-by: Tobias Jordan <tobias.jor...@elektrobit.com>
---
 drivers/i2c/busses/i2c-axxia.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/i2c/busses/i2c-axxia.c b/drivers/i2c/busses/i2c-axxia.c
index 13f07482ec68..51338c48d193 100644
--- a/drivers/i2c/busses/i2c-axxia.c
+++ b/drivers/i2c/busses/i2c-axxia.c
@@ -532,6 +532,12 @@ static int axxia_i2c_probe(struct platform_device *pdev)
        if (idev->bus_clk_rate == 0)
                idev->bus_clk_rate = 100000;    /* default clock rate */
 
+       ret = clk_prepare_enable(idev->i2c_clk);
+       if (ret) {
+               dev_err(&pdev->dev, "failed to enable clock\n");
+               return ret;
+       }
+
        ret = axxia_i2c_init(idev);
        if (ret) {
                dev_err(&pdev->dev, "failed to initialize\n");
@@ -545,12 +551,6 @@ static int axxia_i2c_probe(struct platform_device *pdev)
                return ret;
        }
 
-       ret = clk_prepare_enable(idev->i2c_clk);
-       if (ret) {
-               dev_err(&pdev->dev, "failed to enable clock\n");
-               return ret;
-       }
-
        i2c_set_adapdata(&idev->adapter, idev);
        strlcpy(idev->adapter.name, pdev->name, sizeof(idev->adapter.name));
        idev->adapter.owner = THIS_MODULE;
-- 
2.11.0