linux-kernel - [PATCH v2 1/2] platform/x86/drivers/acerhdf: Use module_param

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Date:   Thu,  3 Dec 2020 08:17:37 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     daniel.lezcano@...aro.org, peter@...e.net, hdegoede@...hat.com,
        mgross@...ux.intel.com
Cc:     platform-driver-x86@...r.kernel.org (open list:ACER ASPIRE ONE
        TEMPERATURE AND FAN DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 1/2] platform/x86/drivers/acerhdf: Use module_param_cb to set/get polling interval

The module parameter can be set by using ops to get and set the
values. The change will allow to check the correctness of the interval
value everytime it is changed instead of checking in the get_temp
function.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 drivers/platform/x86/acerhdf.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
index 44b6bfbd32df..19fc8ff2225c 100644
--- a/drivers/platform/x86/acerhdf.c
+++ b/drivers/platform/x86/acerhdf.c
@@ -84,8 +84,6 @@ static struct platform_device *acerhdf_dev;
 
 module_param(kernelmode, uint, 0);
 MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off");
-module_param(interval, uint, 0600);
-MODULE_PARM_DESC(interval, "Polling interval of temperature check");
 module_param(fanon, uint, 0600);
 MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature");
 module_param(fanoff, uint, 0600);
@@ -824,3 +822,11 @@ MODULE_ALIAS("dmi:*:*Acer*:pnExtensa*5420*:");
 
 module_init(acerhdf_init);
 module_exit(acerhdf_exit);
+
+static const struct kernel_param_ops interval_ops = {
+	.set = param_set_uint,
+	.get = param_get_uint,
+};
+
+module_param_cb(interval, &interval_ops, &interval, 0600);
+MODULE_PARM_DESC(interval, "Polling interval of temperature check");
-- 
2.25.1