linux-kernel - [PATCH 1/2] mailbox: mailbox-test: Fix module autoload

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Message-Id: <1476934445-17718-1-git-send-email-javier@osg.samsung.com>
Date:   Thu, 20 Oct 2016 00:34:04 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Lee Jones <lee.jones@...aro.org>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Jassi Brar <jassisinghbrar@...il.com>
Subject: [PATCH 1/2] mailbox: mailbox-test: 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/mailbox/mailbox-test.ko | grep alias
$

After this patch:

$ modinfo drivers/mailbox/mailbox-test.ko | grep alias
alias:          of:N*T*Cmailbox-testC*
alias:          of:N*T*Cmailbox-test

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

 drivers/mailbox/mailbox-test.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c
index 9ca96e9db6bf..deb9c61aebb4 100644
--- a/drivers/mailbox/mailbox-test.c
+++ b/drivers/mailbox/mailbox-test.c
@@ -357,6 +357,7 @@ static const struct of_device_id mbox_test_match[] = {
 	{ .compatible = "mailbox-test" },
 	{},
 };
+MODULE_DEVICE_TABLE(of, mbox_test_match);
 
 static struct platform_driver mbox_test_driver = {
 	.driver = {
-- 
2.7.4