linux-kernel - [PATCH] staging: fbtft: Fix module autoload

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Date:   Mon, 17 Oct 2016 16:21:21 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org,
        Noralf Trønnes <noralf@...nnes.org>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: [PATCH] staging: fbtft: 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/fbtft/flexfb.ko | grep alias
$

After this patch:

$ modinfo drivers/staging/fbtft/flexfb.ko | grep alias
alias:          platform:flexpfb

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

 drivers/staging/fbtft/flexfb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/fbtft/flexfb.c b/drivers/staging/fbtft/flexfb.c
index 2dc5f9b6b47e..ded10718712b 100644
--- a/drivers/staging/fbtft/flexfb.c
+++ b/drivers/staging/fbtft/flexfb.c
@@ -830,6 +830,7 @@ static const struct platform_device_id flexfb_platform_ids[] = {
 	{ "flexpfb", 0 },
 	{ },
 };
+MODULE_DEVICE_TABLE(platform, flexfb_platform_ids);
 
 static struct platform_driver flexfb_platform_driver = {
 	.driver = {
-- 
2.7.4