slimbus: ngd: Fix reference count leak in qcom_slim_ngd_notify_slaves

The function qcom_slim_ngd_notify_slaves() calls of_slim_get_device() which
internally uses device_find_child() to obtain a device reference.
According to the device_find_child() documentation,
the caller must drop the reference with put_device() after use.

Found via static analysis and this is similar to commit 4e65bda
("ASoC: wcd934x: fix error handling in wcd934x_codec_parse_data()")

Fixes: 917809e ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Cc: stable <[email protected]>
Signed-off-by: Miaoqian Lin <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Yuuoniy

drivers/slimbus/qcom-ngd-ctrl.c

@@ -1241,6 +1241,7 @@ static void qcom_slim_ngd_notify_slaves(struct qcom_slim_ngd_ctrl *ctrl)
 
 		if (slim_get_logical_addr(sbdev))
 			dev_err(ctrl->dev, "Failed to get logical address\n");
+		put_device(&sbdev->dev);
 	}
 }