linux-kernel - [PATCH] bus: arm-ccn: Fix module autoload

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Message-Id: <1483362149-3771-1-git-send-email-javier@osg.samsung.com>
Date:   Mon,  2 Jan 2017 10:02:29 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Pawel Moll <pawel.moll@....com>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH] bus: arm-ccn: Fix module autoload

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/bus/arm-ccn.ko | grep alias
$

After this patch:

$ modinfo drivers/bus/arm-ccn.ko | grep alias
alias:          of:N*T*Carm,ccn-504C*
alias:          of:N*T*Carm,ccn-504

Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
---

 drivers/bus/arm-ccn.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c
index 4d6a2b7e4d3f..80758f6fdaa5 100644
--- a/drivers/bus/arm-ccn.c
+++ b/drivers/bus/arm-ccn.c
@@ -1547,6 +1547,7 @@ static const struct of_device_id arm_ccn_match[] = {
 	{ .compatible = "arm,ccn-504", },
 	{},
 };
+MODULE_DEVICE_TABLE(of, arm_ccn_match);
 
 static struct platform_driver arm_ccn_driver = {
 	.driver = {
-- 
2.7.4