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From:   Yong Wu <yong.wu@mediatek.com>
To:     Matthias Brugger <matthias.bgg@gmail.com>,
        Joerg Roedel <joro@8bytes.org>,
        Rob Herring <robh+dt@kernel.org>
CC:     Evan Green <evgreen@chromium.org>,
        Robin Murphy <robin.murphy@arm.com>,
        Tomasz Figa <tfiga@google.com>,
        Will Deacon <will.deacon@arm.com>,
        <linux-mediatek@lists.infradead.org>,
        <srv_heupstream@mediatek.com>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <iommu@lists.linux-foundation.org>, <yong.wu@mediatek.com>,
        <youlin.pei@mediatek.com>, Nicolas Boichat <drinkcat@chromium.org>,
        Matthias Kaehlcke <mka@chromium.org>, <anan.sun@mediatek.com>,
        <cui.zhang@mediatek.com>, <chao.hao@mediatek.com>,
        <ming-fan.chen@mediatek.com>
Subject: [PATCH v3 11/14] memory: mtk-smi: Use device_is_bound to check if smi-common is ready
Date:   Tue, 3 Sep 2019 17:37:33 +0800
Message-ID: <1567503456-24725-12-git-send-email-yong.wu@mediatek.com>
In-Reply-To: <1567503456-24725-1-git-send-email-yong.wu@mediatek.com>
References: <1567503456-24725-1-git-send-email-yong.wu@mediatek.com>
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smi-larb driver should run after smi-common, Use device_is_bound to confirm
whether smicommon driver is ready.

CC: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/memory/mtk-smi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 3df9036..789d2ab 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -296,8 +296,14 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 	smi_pdev = of_find_device_by_node(smi_node);
 	of_node_put(smi_node);
 	if (smi_pdev) {
-		if (!platform_get_drvdata(smi_pdev))
+		bool smicommon_is_bound;
+
+		device_lock(&smi_pdev->dev);
+		smicommon_is_bound = device_is_bound(&smi_pdev->dev);
+		device_unlock(&smi_pdev->dev);
+		if (!smicommon_is_bound)
 			return -EPROBE_DEFER;
+
 		larb->smi_common_dev = &smi_pdev->dev;
 		link = device_link_add(dev, larb->smi_common_dev,
 				       DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
-- 
1.9.1