From: Peiwei Hu <jlu.hpw@foxmail.com>
Date: Fri, 19 Nov 2021 09:12:18 +0000 (+0800)
Subject: powerpc/prom_init: Fix improper check of prom_getprop()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b2655590dcdd9863972149446e6e31dc14c0ad7c;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

powerpc/prom_init: Fix improper check of prom_getprop()

[ Upstream commit 869fb7e5aecbc163003f93f36dcc26d0554319f6 ]

prom_getprop() can return PROM_ERROR. Binary operator can not identify
it.

Fixes: 94d2dde738a5 ("[POWERPC] Efika: prune fixups and make them more carefull")
Signed-off-by: Peiwei Hu <jlu.hpw@foxmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/tencent_BA28CC6897B7C95A92EB8C580B5D18589105@qq.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index f8782c7ef50f..7f049a60747e 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2774,7 +2774,7 @@ static void __init fixup_device_tree_efika_add_phy(void)
 
 	/* Check if the phy-handle property exists - bail if it does */
 	rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
-	if (!rv)
+	if (rv <= 0)
 		return;
 
 	/*