linux-kernel - [PATCH 2/2] mailbox: sti: Fix module autoload for OF registration

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Message-Id: <1476934445-17718-2-git-send-email-javier@osg.samsung.com>
Date:   Thu, 20 Oct 2016 00:34:05 -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 2/2] mailbox: sti: Fix module autoload for OF registration

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-sti.ko | grep alias
alias:          platform:mailbox-sti

After this patch:

$ modinfo drivers/mailbox/mailbox-sti.ko | grep alias
alias:          platform:mailbox-sti
alias:          of:N*T*Cst,stih407-mailboxC*
alias:          of:N*T*Cst,stih407-mailbox

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

---

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

diff --git a/drivers/mailbox/mailbox-sti.c b/drivers/mailbox/mailbox-sti.c
index a334db5c9f1c..41bcd339b68a 100644
--- a/drivers/mailbox/mailbox-sti.c
+++ b/drivers/mailbox/mailbox-sti.c
@@ -403,6 +403,7 @@ static const struct of_device_id sti_mailbox_match[] = {
 	},
 	{ }
 };
+MODULE_DEVICE_TABLE(of, sti_mailbox_match);
 
 static int sti_mbox_probe(struct platform_device *pdev)
 {
-- 
2.7.4