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| author | Guenter Roeck <linux@roeck-us.net> | 2019-04-04 11:28:37 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-11 12:23:59 +0200 |
| commit | 92b4d16997c40e1c86e19fb0f657d917b5b6f997 (patch) | |
| tree | f4e513f038394877d916485272925f6cec2a34f7 /tools/perf/scripts/python | |
| parent | e3e58378c678bf12b1aa5be1e141aba29b9e2e58 (diff) | |
hwmon: (smsc47m1) Use request_muxed_region for Super-IO accesses
[ Upstream commit d6410408ad2a798c4cc685252c1baa713be0ad69 ]
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: 8d5d45fb1468 ("I2C: Move hwmon drivers (2/3)")
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions