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Subject[PATCH v2] memory: mtk-smi: add missing put_device() call in mtk_smi_device_link_common
Date
The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore.
Add the corresponding 'put_device()' in the error handling paths.

Fixes: 4740475 ("memory: mtk-smi: Add device link for smi-sub-common")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
changes in v2:
- add put_device() in return path -ENODEV.

I don't add put_device in normal path(return 0) because it will set
*com_dev=&smi_com_pdev->dev; and escape to the caller.

v1 link:
https://lore.kernel.org/all/20211230084115.5375-1-linmq006@gmail.com/
---
drivers/memory/mtk-smi.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 86a3d34f418e..4c5154e0bf00 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -404,13 +404,16 @@ static int mtk_smi_device_link_common(struct device *dev, struct device **com_de
of_node_put(smi_com_node);
if (smi_com_pdev) {
/* smi common is the supplier, Make sure it is ready before */
- if (!platform_get_drvdata(smi_com_pdev))
+ if (!platform_get_drvdata(smi_com_pdev)) {
+ put_device(&smi_com_pdev->dev);
return -EPROBE_DEFER;
+ }
smi_com_dev = &smi_com_pdev->dev;
link = device_link_add(dev, smi_com_dev,
DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
if (!link) {
dev_err(dev, "Unable to link smi-common dev\n");
+ put_device(&smi_com_pdev->dev);
return -ENODEV;
}
*com_dev = smi_com_dev;
--
2.25.1
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