linux-kernel - [PATCH 4.4 26/59] scsi: ufs-qcom: Fix module autoload

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Message-Id: <20171119143152.169092950@linuxfoundation.org>
Date:   Sun, 19 Nov 2017 15:32:34 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Javier Martinez Canillas <javier@....samsung.com>,
        Subhash Jadavani <subhashj@...eaurora.org>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.4 26/59] scsi: ufs-qcom: Fix module autoload

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Martinez Canillas <javier@....samsung.com>


[ Upstream commit ab3dabb3e8cf077850f20610f73a0def1fed10cb ]

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/scsi/ufs/ufs-qcom.ko | grep alias
$

After this patch:

$ modinfo drivers/scsi/ufs/ufs-qcom.ko | grep alias
alias:          of:N*T*Cqcom,ufshcC*
alias:          of:N*T*Cqcom,ufshc

Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
Reviewed-by: Subhash Jadavani <subhashj@...eaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/scsi/ufs/ufs-qcom.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -1552,6 +1552,7 @@ static const struct of_device_id ufs_qco
 	{ .compatible = "qcom,ufshc"},
 	{},
 };
+MODULE_DEVICE_TABLE(of, ufs_qcom_of_match);
 
 static const struct dev_pm_ops ufs_qcom_pm_ops = {
 	.suspend	= ufshcd_pltfrm_suspend,