linux-kernel - [PATCH 4/5] [media] s5p-cec: Fix module autoload

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Date:   Mon, 17 Oct 2016 12:44:11 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Arnd Bergmann <arnd@...db.de>, devel@...verdev.osuosl.org,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Kamil Debski <kamil@...as.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        linux-media@...r.kernel.org
Subject: [PATCH 4/5] [media] s5p-cec: 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/staging/media/s5p-cec/s5p-cec.ko | grep alias
$

After this patch:

$ modinfo drivers/staging/media/s5p-cec/s5p-cec.ko | grep alias
alias:          of:N*T*Csamsung,s5p-cecC*
alias:          of:N*T*Csamsung,s5p-cec

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

 drivers/staging/media/s5p-cec/s5p_cec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/media/s5p-cec/s5p_cec.c b/drivers/staging/media/s5p-cec/s5p_cec.c
index 1780a08b73c9..4e41f72dbfaa 100644
--- a/drivers/staging/media/s5p-cec/s5p_cec.c
+++ b/drivers/staging/media/s5p-cec/s5p_cec.c
@@ -263,6 +263,7 @@ static const struct of_device_id s5p_cec_match[] = {
 	},
 	{},
 };
+MODULE_DEVICE_TABLE(of, s5p_cec_match);
 
 static struct platform_driver s5p_cec_pdrv = {
 	.probe	= s5p_cec_probe,
-- 
2.7.4