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PM / devfreq: rk3399_dmc: Avoid static (reused) profile 

This static struct can get reused if the device gets removed/reprobed,
and that causes use-after-free in its ->freq_table.

Let's just move the struct to our dynamic allocation.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Brian Norris 2022-03-08 11:09:01 -08:00 committed by Chanwoo Choi
parent cb178a9585
commit 5d521a3075
1 changed files with 9 additions and 9 deletions
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18
drivers/devfreq/rk3399_dmc.c
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@ -38,6 +38,7 @@
struct rk3399_dmcfreq {
struct device *dev;
struct devfreq *devfreq;
struct devfreq_dev_profile profile;
struct devfreq_simple_ondemand_data ondemand_data;
struct clk *dmc_clk;
struct devfreq_event_dev *edev;
@ -228,13 +229,6 @@ static int rk3399_dmcfreq_get_cur_freq(struct device *dev, unsigned long *freq)
return 0;
}
static struct devfreq_dev_profile rk3399_devfreq_dmc_profile = {
.polling_ms = 200,
.target = rk3399_dmcfreq_target,
.get_dev_status = rk3399_dmcfreq_get_dev_status,
.get_cur_freq = rk3399_dmcfreq_get_cur_freq,
};
static __maybe_unused int rk3399_dmcfreq_suspend(struct device *dev)
{
struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(dev);
@ -422,10 +416,16 @@ no_pmu:
data->volt = dev_pm_opp_get_voltage(opp);
dev_pm_opp_put(opp);
rk3399_devfreq_dmc_profile.initial_freq = data->rate;
data->profile = (struct devfreq_dev_profile) {
.polling_ms = 200,
.target = rk3399_dmcfreq_target,
.get_dev_status = rk3399_dmcfreq_get_dev_status,
.get_cur_freq = rk3399_dmcfreq_get_cur_freq,
.initial_freq = data->rate,
};
data->devfreq = devm_devfreq_add_device(dev,
&rk3399_devfreq_dmc_profile,
&data->profile,
DEVFREQ_GOV_SIMPLE_ONDEMAND,
&data->ondemand_data);
if (IS_ERR(data->devfreq)) {