linux-kernel - [PATCH 2/3] thermal: core: Reorder 'thermal_zone_device

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Date:   Sun, 16 Jul 2017 08:59:03 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     rui.zhang@...el.com, edubezval@...il.com
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 2/3] thermal: core: Reorder 'thermal_zone_device_register()' error handling code

Reorder code in the error handling path in order to match the way resources
have been allocated.

With this new order, we can avoid a call to 'device_unregister()' if
'thermal_zone_create_device_groups'()' fails. At this point,
'device_register()' has not been called yet.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/thermal/thermal_core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 9743f3e65eb0..c58714800660 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1232,7 +1232,7 @@ thermal_zone_device_register(const char *type, int trips, int mask,
 	/* Add nodes that are always present via .groups */
 	result = thermal_zone_create_device_groups(tz, mask);
 	if (result)
-		goto unregister;
+		goto remove_id;
 
 	/* A new thermal zone needs to be updated anyway. */
 	atomic_set(&tz->need_update, 1);
@@ -1294,8 +1294,9 @@ thermal_zone_device_register(const char *type, int trips, int mask,
 	return tz;
 
 unregister:
-	ida_simple_remove(&thermal_tz_ida, tz->id);
 	device_unregister(&tz->device);
+remove_id:
+	ida_simple_remove(&thermal_tz_ida, tz->id);
 	kfree(tz);
 	return ERR_PTR(result);
 }
-- 
2.11.0