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powerpc/prom_init: Fix improper check of prom_getprop()

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[ Upstream commit 869fb7e5ae ]

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

Fixes: 94d2dde738 ("[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>
This commit is contained in:
Peiwei Hu 2021-11-19 17:12:18 +08:00 • committed by Greg Kroah-Hartman
commit 5a821af769
1 changed files with 1 additions and 1 deletions
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arch/powerpc/kernel/prom_init.c
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@ -2956,7 +2956,7 @@ 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;
/*