linux-kernel - [PATCH] spi: cadence-quadspi: add missing of_node

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Date:   Mon, 15 Feb 2021 19:04:25 +0800
From:   angkery <angkery@....com>
To:     broonie@...nel.org
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Junlin Yang <yangjunlin@...ong.com>
Subject: [PATCH] spi: cadence-quadspi: add missing of_node_put

From: Junlin Yang <yangjunlin@...ong.com>

Fix OF node leaks by calling of_node_put in
for_each_available_child_of_node when the cycle returns.

Generated by: scripts/coccinelle/iterators/for_each_child.cocci

Signed-off-by: Junlin Yang <yangjunlin@...ong.com>
---
 drivers/spi/spi-cadence-quadspi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 442cc7c..14a7120 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1389,11 +1389,13 @@ static int cqspi_setup_flash(struct cqspi_st *cqspi)
 		ret = of_property_read_u32(np, "reg", &cs);
 		if (ret) {
 			dev_err(dev, "Couldn't determine chip select.\n");
+			of_node_put(np);
 			return ret;
 		}
 
 		if (cs >= CQSPI_MAX_CHIPSELECT) {
 			dev_err(dev, "Chip select %d out of range.\n", cs);
+			of_node_put(np);
 			return -EINVAL;
 		}
 
@@ -1402,8 +1404,10 @@ static int cqspi_setup_flash(struct cqspi_st *cqspi)
 		f_pdata->cs = cs;
 
 		ret = cqspi_of_get_flash_pdata(pdev, f_pdata, np);
-		if (ret)
+		if (ret) {
+			of_node_put(np);
 			return ret;
+		}
 	}
 
 	return 0;
-- 
1.9.1