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 f8782c7ef50f1350a58b4fb28e303cb7f8a68f2e..7f049a60747e9a7f67914a36d505967f975c7015 100644 (file)
--- 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;
 
        /*