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platform: mips: cpu_hwmon: Disable driver on unsupported hardware

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commit f4d430db17b4ef4e9c3c352a04b2fe3c93011978 upstream.

cpu_hwmon is unsupported on CPUs without loongson_chiptemp
register and csr.

Cc: stable@vger.kernel.org
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiaxun Yang 2024-06-14 16:40:15 +01:00 committed by Greg Kroah-Hartman
parent 19f108b3d1
commit 9667d46f8a
1 changed files with 3 additions and 0 deletions
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3
drivers/platform/mips/cpu_hwmon.c
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@ -139,6 +139,9 @@ static int __init loongson_hwmon_init(void)
csr_temp_enable = csr_readl(LOONGSON_CSR_FEATURES) &
LOONGSON_CSRF_TEMP;
if (!csr_temp_enable && !loongson_chiptemp[0])
return -ENODEV;
nr_packages = loongson_sysconf.nr_cpus /
loongson_sysconf.cores_per_package;