i2c: omap: fix reference leak when pm_runtime_get_sync fails

The PM reference count is not expected to be incremented on
return in omap_i2c_probe() and omap_i2c_remove().

However, pm_runtime_get_sync will increment the PM reference
count even failed. Forgetting to putting operation will result
in a reference leak here. I Replace it with pm_runtime_resume_and_get
to keep usage counter balanced.

What's more, error path 'err_free_mem' seems not like a proper
name any more. So I change the name to err_disable_pm and move
pm_runtime_disable below, for pm_runtime of 'pdev->dev' should
be disabled when pm_runtime_resume_and_get fails.

Fixes: 3b0fb97c ("I2C: OMAP: Handle error check for pm runtime")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-omap.c

@@ -1404,9 +1404,9 @@ omap_i2c_probe(struct platform_device *pdev)
 	pm_runtime_set_autosuspend_delay(omap->dev, OMAP_I2C_PM_TIMEOUT);
 	pm_runtime_use_autosuspend(omap->dev);
 
-	r = pm_runtime_get_sync(omap->dev);
+	r = pm_runtime_resume_and_get(omap->dev);
 	if (r < 0)
-		goto err_free_mem;
+		goto err_disable_pm;
 
 	/*
 	 * Read the Rev hi bit-[15:14] ie scheme this is 1 indicates ver2.
@@ -1513,8 +1513,8 @@ omap_i2c_probe(struct platform_device *pdev)
 	omap_i2c_write_reg(omap, OMAP_I2C_CON_REG, 0);
 	pm_runtime_dont_use_autosuspend(omap->dev);
 	pm_runtime_put_sync(omap->dev);
+err_disable_pm:
 	pm_runtime_disable(&pdev->dev);
-err_free_mem:
 
 	return r;
 }
@@ -1525,7 +1525,7 @@ static int omap_i2c_remove(struct platform_device *pdev)
 	int ret;
 
 	i2c_del_adapter(&omap->adapter);
-	ret = pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0)
 		return ret;