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| author | Shawn Lin <shawn.lin@rock-chips.com> | 2018-02-23 16:47:25 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-02-27 15:12:36 +0100 |
| commit | 5b43df8b4c1a7f0c3fbf793c9566068e6b1e570c (patch) | |
| tree | 9d8a72f1db810fe6705d3597fe9999bda4ed1ad9 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | 0d84b9e5631d923744767dc6608672df906dd092 (diff) | |
mmc: dw_mmc: Avoid accessing registers in runtime suspended state
cat /sys/kernel/debug/mmc0/regs will hang up the system since
it's in runtime suspended state, so the genpd and biu_clk is
off. This patch fixes this problem by calling pm_runtime_get_sync
to wake it up before reading the registers.
Fixes: e9ed8835e990 ("mmc: dw_mmc: add runtime PM callback")
Cc: <stable@vger.kernel.org>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions