[PATCH v3 11/14] memory: mtk-smi: Use device_is_bound to check if smi-common is ready

Yong Wu
2019-09-03T09:39:53Z

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);