From: Liang He <windhl@126.com>
Date: Thu, 30 Jun 2022 08:36:57 +0000 (+0800)
Subject: crypto: nx - Hold the reference returned by of_find_compatible_node
X-Git-Tag: v6.6.17~6939^2~41
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8ccc9cc47c8c9e69c7bd9a7694a1d8c33108dd28;p=platform%2Fkernel%2Flinux-rpi.git

crypto: nx - Hold the reference returned by of_find_compatible_node

In nx842_pseries_init(), we should hold the reference returned by
of_find_compatible_node() and use it to call of_node_put to keep
refcount balance.

Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/nx/nx-common-pseries.c b/drivers/crypto/nx/nx-common-pseries.c
index 7584a34..3ea334b 100644
--- a/drivers/crypto/nx/nx-common-pseries.c
+++ b/drivers/crypto/nx/nx-common-pseries.c
@@ -1208,10 +1208,13 @@ static struct vio_driver nx842_vio_driver = {
 static int __init nx842_pseries_init(void)
 {
 	struct nx842_devdata *new_devdata;
+	struct device_node *np;
 	int ret;
 
-	if (!of_find_compatible_node(NULL, NULL, "ibm,compression"))
+	np = of_find_compatible_node(NULL, NULL, "ibm,compression");
+	if (!np)
 		return -ENODEV;
+	of_node_put(np);
 
 	RCU_INIT_POINTER(devdata, NULL);
 	new_devdata = kzalloc(sizeof(*new_devdata), GFP_KERNEL);