tree e422c6cac1816e79be997918208052b2684b917a
parent 53276cf018cb0e72f484fda07c3cf4b9b75b50d0
author Kai-Heng Feng <kai.heng.feng@canonical.com> 1541407504 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1549997095 +0100

memstick: Prevent memstick host from getting runtime suspended during card detection

[ Upstream commit e03e303edf1c63e6dd455ccd568c74e93ef3ba8c ]

We can use MEMSTICK_POWER_{ON,OFF} along with pm_runtime_{get,put}
helpers to let memstick host support runtime pm.

The rpm count may go down to zero before the memstick host powers on, so
the host can be runtime suspended.

So before doing card detection, increment the rpm count to avoid the
host gets runtime suspended. Balance the rpm count after card detection
is done.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>