hwmon: (ibmaem) don't call platform_device_del() if platform_device_add() fails

[ Upstream commit d0e51022a025ca5350fafb8e413a6fe5d4baf833 ]

If platform_device_add() fails, it no need to call platform_device_del(), split
platform_device_unregister() into platform_device_del/put(), so platform_device_put()
can be called separately.

Fixes: 8808a793f052 ("ibmaem: new driver for power/energy/temp meters in IBM System X hardware")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220701074153.4021556-1-yangyingliang@huawei.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
index a4ec852..2e6d6a5 100644 (file)
--- a/drivers/hwmon/ibmaem.c
+++ b/drivers/hwmon/ibmaem.c
@@ -550,7 +550,7 @@ static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
 
        res = platform_device_add(data->pdev);
        if (res)
-               goto ipmi_err;
+               goto dev_add_err;
 
        platform_set_drvdata(data->pdev, data);
 
@@ -598,7 +598,9 @@ hwmon_reg_err:
        ipmi_destroy_user(data->ipmi.user);
 ipmi_err:
        platform_set_drvdata(data->pdev, NULL);
-       platform_device_unregister(data->pdev);
+       platform_device_del(data->pdev);
+dev_add_err:
+       platform_device_put(data->pdev);
 dev_err:
        ida_simple_remove(&aem_ida, data->id);
 id_err:
@@ -690,7 +692,7 @@ static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
 
        res = platform_device_add(data->pdev);
        if (res)
-               goto ipmi_err;
+               goto dev_add_err;
 
        platform_set_drvdata(data->pdev, data);
 
@@ -738,7 +740,9 @@ hwmon_reg_err:
        ipmi_destroy_user(data->ipmi.user);
 ipmi_err:
        platform_set_drvdata(data->pdev, NULL);
-       platform_device_unregister(data->pdev);
+       platform_device_del(data->pdev);
+dev_add_err:
+       platform_device_put(data->pdev);
 dev_err:
        ida_simple_remove(&aem_ida, data->id);
 id_err: