hwmon: (pc87427) Use request_muxed_region for Super-IO accesses

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Super-IO accesses may fail on a system with no or unmapped LPC bus.

Also, other drivers may attempt to access the LPC bus at the same time,
resulting in undefined behavior.

Use request_muxed_region() to ensure that IO access on the requested
address space is supported, and to ensure that access by multiple drivers
is synchronized.

Fixes: ba224e2c4f ("hwmon: New PC87427 hardware monitoring driver")
Reported-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reported-by: John Garry <john.garry@huawei.com>
Cc: John Garry <john.garry@huawei.com>
Acked-by: John Garry <john.garry@huawei.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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This commit is contained in:

Guenter Roeck 2019-04-04 11:16:20 -07:00

parent 73e6ff71a7

commit 755a9b0f8a

1 changed files with 13 additions and 1 deletions

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drivers/hwmon/pc87427.c

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