linux-kernel - [PATCH 1/2] mmc: mediatek: Fix module autoload

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Date:   Mon, 17 Oct 2016 13:13:44 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        linux-mmc@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Douglas Anderson <dianders@...omium.org>,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 1/2] mmc: mediatek: 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/mmc/host/mtk-sd.ko | grep alias
$

After this patch:

$ modinfo drivers/mmc/host/mtk-sd.ko | grep alias
alias:          of:N*T*Cmediatek,mt8135-mmcC*
alias:          of:N*T*Cmediatek,mt8135-mmc

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

 drivers/mmc/host/mtk-sd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 84e9afcb5c09..86af0b199a54 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1713,6 +1713,7 @@ static const struct of_device_id msdc_of_ids[] = {
 	{   .compatible = "mediatek,mt8135-mmc", },
 	{}
 };
+MODULE_DEVICE_TABLE(of, msdc_of_ids);
 
 static struct platform_driver mt_msdc_driver = {
 	.probe = msdc_drv_probe,
-- 
2.7.4