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From: Nicholas Mc Guire <hofrat@osadl.org>
To: Michael Ellerman <michael@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
	Nicholas Mc Guire <hofrat@osadl.org>
Subject: [PATCH] powerpc: hwrng; fix missing of_node_put()
Date: Mon,  2 Jul 2018 11:08:16 +0200	[thread overview]
Message-ID: <1530522496-14816-1-git-send-email-hofrat@osadl.org> (raw)

 The call to of_find_compatible_node() returns a node pointer with refcount
incremented thus it must be explicitly decremented here before returning.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: commit a489043f4626 ("powerpc/pseries: Implement arch_get_random_long() based on H_RANDOM")
---
Problem found with experimental coccinelle script

Patch was compiletested with: ppc64_defconfig (implies CONFIG_PPC_PSERIES=y)
with some unrelated sparse warnings (which I did not understand)
./arch/powerpc/include/asm/head-64.h:13:36: warning: Unknown escape '('
./arch/powerpc/include/asm/head-64.h:16:36: warning: Unknown escape '('
./arch/powerpc/include/asm/head-64.h:19:36: warning: Unknown escape '('

Patch is aginst 4.18-rc2 (localversion-next is next-20180702)

 arch/powerpc/platforms/pseries/rng.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/platforms/pseries/rng.c b/arch/powerpc/platforms/pseries/rng.c
index 31ca557..262b8c5 100644
--- a/arch/powerpc/platforms/pseries/rng.c
+++ b/arch/powerpc/platforms/pseries/rng.c
@@ -40,6 +40,7 @@ static __init int rng_init(void)
 
 	ppc_md.get_random_seed = pseries_get_random_long;
 
+	of_node_put(dn);
 	return 0;
 }
 machine_subsys_initcall(pseries, rng_init);
-- 
2.1.4


             reply	other threads:[~2018-07-02  9:13 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-02  9:08 Nicholas Mc Guire [this message]
2020-09-09 13:37 ` [PATCH] powerpc: hwrng; fix missing of_node_put() Michael Ellerman
2020-09-09 13:37   ` Michael Ellerman

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