From: Nishka Dasgupta <nishkadg.linux@gmail.com>
To: marek.vasut@gmail.com, tudor.ambarus@microchip.com,
dwmw2@infradead.org, computersforpeace@gmail.com,
miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
joel@jms.id.au, andrew@aj.id.au, linux-mtd@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-aspeed@lists.ozlabs.org
Cc: Nishka Dasgupta <nishkadg.linux@gmail.com>
Subject: [PATCH] mtd: spi-nor: aspeed-smc: Add of_node_put()
Date: Thu, 8 Aug 2019 13:21:04 +0530 [thread overview]
Message-ID: <20190808075104.15928-1-nishkadg.linux@gmail.com> (raw)
Each iteration of for_each_available_child_of_node puts the previous
node, but in the case of a break from the middle of the loop, there is
no put, thus causing a memory leak. Upon termination of the loop
(whether by break or a natural exit), either ret will have a non-zero
value or child will be NULL. Hence add an of_node_put() that will
execute only when ret has a non-zero value, as calling of_node_put() on
a possible NULL value does not cause any further issues.
Issue found with Coccinelle.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
---
drivers/mtd/spi-nor/aspeed-smc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/spi-nor/aspeed-smc.c b/drivers/mtd/spi-nor/aspeed-smc.c
index 19b8757325d2..009c1da8574c 100644
--- a/drivers/mtd/spi-nor/aspeed-smc.c
+++ b/drivers/mtd/spi-nor/aspeed-smc.c
@@ -836,8 +836,10 @@ static int aspeed_smc_setup_flash(struct aspeed_smc_controller *controller,
controller->chips[cs] = chip;
}
- if (ret)
+ if (ret) {
+ of_node_put(child);
aspeed_smc_unregister(controller);
+ }
return ret;
}
--
2.19.1
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next reply other threads:[~2019-08-08 7:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 7:51 Nishka Dasgupta [this message]
2019-08-09 0:38 ` [PATCH] mtd: spi-nor: aspeed-smc: Add of_node_put() Andrew Jeffery
2019-08-28 10:20 ` Tudor.Ambarus
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