linux-kernel - [PATCH v2] thermal: Add some error messages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <31a29628894a14e716fff113fd9ce945fe649c05.1562876950.git.amit.kucheria@linaro.org>
Date:   Fri, 12 Jul 2019 02:01:58 +0530
From:   Amit Kucheria <amit.kucheria@...aro.org>
To:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        joe@...ches.com, Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     linux-pm@...r.kernel.org
Subject: [PATCH v2] thermal: Add some error messages

When registering a thermal zone device, we currently return -EINVAL in
four cases. This makes it a little hard to debug the real cause of the
failure.

Print some error messages to make it easier for developer to figure out
what happened.

Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
---
 drivers/thermal/thermal_core.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 46cfb7de4eb2..e1c2c2638219 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1238,17 +1238,26 @@ thermal_zone_device_register(const char *type, int trips, int mask,
 	int count;
 	struct thermal_governor *governor;
 
-	if (!type || strlen(type) == 0)
+	if (!type || strlen(type) == 0) {
+		pr_err("Error: No thermal zone type defined\n");
 		return ERR_PTR(-EINVAL);
+	}
 
-	if (type && strlen(type) >= THERMAL_NAME_LENGTH)
+	if (type && strlen(type) >= THERMAL_NAME_LENGTH) {
+		pr_err("Error: Thermal zone name (%s) too long, should be under %d chars\n",
+		       type, THERMAL_NAME_LENGTH);
 		return ERR_PTR(-EINVAL);
+	}
 
-	if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
+	if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) {
+		pr_err("Error: Incorrect number of thermal trips\n");
 		return ERR_PTR(-EINVAL);
+	}
 
-	if (!ops)
+	if (!ops) {
+		pr_err("Error: Thermal zone device ops not defined\n");
 		return ERR_PTR(-EINVAL);
+	}
 
 	if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp))
 		return ERR_PTR(-EINVAL);
-- 
2.17.1