[PATCH v4 14/17] memory: mtk-smi: Use device_is_bound to check if smi-common is ready
From: Yong Wu <yong.wu@mediatek.com>
Date: 2020-05-30 08:14:41
Also in:
linux-arm-kernel, linux-iommu, linux-mediatek, lkml
Subsystem:
mediatek smi driver, memory controller drivers, the rest · Maintainers:
Yong Wu, Krzysztof Kozlowski, Linus Torvalds
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 19c3949..0f8cd50 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