linux-kernel - [PATCH] iommu/mediatek-v1: Fix a build warning for a unused variable 'data'

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Date:   Tue, 19 May 2020 15:57:44 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        Will Deacon <will.deacon@....com>,
        Robin Murphy <robin.murphy@....com>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <yong.wu@...iatek.com>,
        <youlin.pei@...iatek.com>, <anan.sun@...iatek.com>
Subject: [PATCH] iommu/mediatek-v1: Fix a build warning for a unused variable 'data'

This patch fixes a build warning:
drivers/iommu/mtk_iommu_v1.c: In function 'mtk_iommu_release_device':
>> drivers/iommu/mtk_iommu_v1.c:467:25: warning: variable 'data' set but
>> not used [-Wunused-but-set-variable]
467 |  struct mtk_iommu_data *data;
|                         ^~~~

It's reported at:
https://lore.kernel.org/linux-iommu/202005191458.gY38V8bU%25lkp@intel.com/T/#u

Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Yong Wu <yong.wu@...iatek.com>
---
 drivers/iommu/mtk_iommu_v1.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
index f353b07..c9d79cf 100644
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -469,12 +469,10 @@ static void mtk_iommu_probe_finalize(struct device *dev)
 static void mtk_iommu_release_device(struct device *dev)
 {
 	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
-	struct mtk_iommu_data *data;
 
 	if (!fwspec || fwspec->ops != &mtk_iommu_ops)
 		return;
 
-	data = dev_iommu_priv_get(dev);
 	iommu_fwspec_free(dev);
 }
 
-- 
1.9.1