linux-kernel - [PATCH 4.4 067/101] hwmon: (scpi) Fix module autoload

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Date:   Tue, 10 Jan 2017 14:37:20 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Javier Martinez Canillas <javier@....samsung.com>,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 4.4 067/101] hwmon: (scpi) Fix module autoload

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Martinez Canillas <javier@....samsung.com>

commit 13edb767aa609b6efb7c0c2b57fbd72a6ded0eed upstream.

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/hwmon/scpi-hwmon.ko | grep alias
$

After this patch:

$ modinfo drivers/hwmon/scpi-hwmon.ko | grep alias
alias:          of:N*T*Carm,scpi-sensorsC*
alias:          of:N*T*Carm,scpi-sensors

Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
Fixes: ea98b29a05e9c ("hwmon: Support sensors exported via ARM SCP interface")
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hwmon/scpi-hwmon.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/hwmon/scpi-hwmon.c
+++ b/drivers/hwmon/scpi-hwmon.c
@@ -272,6 +272,7 @@ static const struct of_device_id scpi_of
 	{.compatible = "arm,scpi-sensors"},
 	{},
 };
+MODULE_DEVICE_TABLE(of, scpi_of_match);
 
 static struct platform_driver scpi_hwmon_platdrv = {
 	.driver = {