linux-kernel - [PATCH 2/2] clk: ti: dra7-atl-clock: fix child-node lookups

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Date:   Sat, 11 Nov 2017 17:29:29 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Stephen Boyd <sboyd@...eaurora.org>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Tero Kristo <t-kristo@...com>, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org, Johan Hovold <johan@...nel.org>,
        stable <stable@...r.kernel.org>,
        Peter Ujfalusi <peter.ujfalusi@...com>
Subject: [PATCH 2/2] clk: ti: dra7-atl-clock: fix child-node lookups

Fix child node-lookup during probe, which ended up searching the whole
device tree depth-first starting at parent rather than just matching on
its children.

Note that the original premature free of the parent node has already
been fixed separately, but that fix was apparently never backported to
stable.

Fixes: 9ac33b0ce81f ("CLK: TI: Driver for DRA7 ATL (Audio Tracking Logic)")
Fixes: 660e15519399 ("clk: ti: dra7-atl-clock: Fix of_node reference counting")
Cc: stable <stable@...r.kernel.org>     # 3.16: 660e15519399
Cc: Peter Ujfalusi <peter.ujfalusi@...com>
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/clk/ti/clk-dra7-atl.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index 13eb04f72389..148815470431 100644
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -274,8 +274,7 @@ static int of_dra7_atl_clk_probe(struct platform_device *pdev)
 
 		/* Get configuration for the ATL instances */
 		snprintf(prop, sizeof(prop), "atl%u", i);
-		of_node_get(node);
-		cfg_node = of_find_node_by_name(node, prop);
+		cfg_node = of_get_child_by_name(node, prop);
 		if (cfg_node) {
 			ret = of_property_read_u32(cfg_node, "bws",
 						   &cdesc->bws);
-- 
2.15.0