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ARM: sun9i: smp: fix return code check of of_property_match_string 

[ Upstream commit 643fe70e7bcdcc9e2d96952f7fc2bab56385cce5 ]

of_property_match_string returns an int; either an index from 0 or
greater if successful or negative on failure. Even it's very
unlikely that the DT CPU node contains multiple enable-methods
these checks should be fixed.

This patch was inspired by the work of Nick Desaulniers.

Link: https://lore.kernel.org/lkml/20230516-sunxi-v1-1-ac4b9651a8c1@google.com/T/
Cc: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/20231228193903.9078-2-wahrenst@gmx.net
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Stefan Wahren 2023-12-28 20:39:03 +01:00 committed by Greg Kroah-Hartman
parent 1e6b9bc8cc
commit f99b7b22c0
1 changed files with 2 additions and 2 deletions
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4
arch/arm/mach-sunxi/mc_smp.c
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@ -803,12 +803,12 @@ static int __init sunxi_mc_smp_init(void)
for (i = 0; i < ARRAY_SIZE(sunxi_mc_smp_data); i++) {
ret = of_property_match_string(node, "enable-method",
sunxi_mc_smp_data[i].enable_method);
if (!ret)
if (ret >= 0)
break;
}
of_node_put(node);
if (ret)
if (ret < 0)
return -ENODEV;
is_a83t = sunxi_mc_smp_data[i].is_a83t;