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| author | Guenter Roeck <linux@roeck-us.net> | 2019-04-04 11:16:20 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-31 06:47:27 -0700 |
| commit | dc1adde622e5de70b647ed49fedb64fd9749be39 (patch) | |
| tree | d219bbb6d3c86ca2535e0ee9bbc08699893ec75f /arch/microblaze | |
| parent | dc5820f72e9183f56c44a6a4a456e677d3afcaa8 (diff) | |
hwmon: (pc87427) Use request_muxed_region for Super-IO accesses
[ Upstream commit 755a9b0f8aaa5639ba5671ca50080852babb89ce ]
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: ba224e2c4f0a7 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/microblaze')
0 files changed, 0 insertions, 0 deletions