* [PATCH AUTOSEL 4.14 05/31] power: supply: bq27xxx: fix power_avg for newer ICs
[not found] <20210503164204.2854178-1-sashal@kernel.org>
@ 2021-05-03 16:41 ` Sasha Levin
2021-05-03 16:41 ` [PATCH AUTOSEL 4.14 10/31] power: supply: Use IRQF_ONESHOT Sasha Levin
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: Sasha Levin @ 2021-05-03 16:41 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Matthias Schiffer, Sebastian Reichel, Sasha Levin, linux-pm
From: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
[ Upstream commit c4d57c22ac65bd503716062a06fad55a01569cac ]
On all newer bq27xxx ICs, the AveragePower register contains a signed
value; in addition to handling the raw value as unsigned, the driver
code also didn't convert it to µW as expected.
At least for the BQ28Z610, the reference manual incorrectly states that
the value is in units of 1mW and not 10mW. I have no way of knowing
whether the manuals of other supported ICs contain the same error, or if
there are models that actually use 1mW. At least, the new code shouldn't
be *less* correct than the old version for any device.
power_avg is removed from the cache structure, se we don't have to
extend it to store both a signed value and an error code. Always getting
an up-to-date value may be desirable anyways, as it avoids inconsistent
current and power readings when switching between charging and
discharging.
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/power/supply/bq27xxx_battery.c | 51 ++++++++++++++------------
include/linux/power/bq27xxx_battery.h | 1 -
2 files changed, 27 insertions(+), 25 deletions(-)
diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index a7d8cadf172c..3e8466064bb2 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -1445,27 +1445,6 @@ static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
return tval * 60;
}
-/*
- * Read an average power register.
- * Return < 0 if something fails.
- */
-static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di)
-{
- int tval;
-
- tval = bq27xxx_read(di, BQ27XXX_REG_AP, false);
- if (tval < 0) {
- dev_err(di->dev, "error reading average power register %02x: %d\n",
- BQ27XXX_REG_AP, tval);
- return tval;
- }
-
- if (di->opts & BQ27XXX_O_ZERO)
- return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
- else
- return tval;
-}
-
/*
* Returns true if a battery over temperature condition is detected
*/
@@ -1562,8 +1541,6 @@ void bq27xxx_battery_update(struct bq27xxx_device_info *di)
}
if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
cache.cycle_count = bq27xxx_battery_read_cyct(di);
- if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR)
- cache.power_avg = bq27xxx_battery_read_pwr_avg(di);
/* We only have to read charge design full once */
if (di->charge_design_full <= 0)
@@ -1625,6 +1602,32 @@ static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
return 0;
}
+/*
+ * Get the average power in µW
+ * Return < 0 if something fails.
+ */
+static int bq27xxx_battery_pwr_avg(struct bq27xxx_device_info *di,
+ union power_supply_propval *val)
+{
+ int power;
+
+ power = bq27xxx_read(di, BQ27XXX_REG_AP, false);
+ if (power < 0) {
+ dev_err(di->dev,
+ "error reading average power register %02x: %d\n",
+ BQ27XXX_REG_AP, power);
+ return power;
+ }
+
+ if (di->opts & BQ27XXX_O_ZERO)
+ val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
+ else
+ /* Other gauges return a signed value in units of 10mW */
+ val->intval = (int)((s16)power) * 10000;
+
+ return 0;
+}
+
static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
union power_supply_propval *val)
{
@@ -1790,7 +1793,7 @@ static int bq27xxx_battery_get_property(struct power_supply *psy,
ret = bq27xxx_simple_value(di->cache.energy, val);
break;
case POWER_SUPPLY_PROP_POWER_AVG:
- ret = bq27xxx_simple_value(di->cache.power_avg, val);
+ ret = bq27xxx_battery_pwr_avg(di, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq27xxx_simple_value(di->cache.health, val);
diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h
index e6187f524f2c..534a8080c6a3 100644
--- a/include/linux/power/bq27xxx_battery.h
+++ b/include/linux/power/bq27xxx_battery.h
@@ -47,7 +47,6 @@ struct bq27xxx_reg_cache {
int capacity;
int energy;
int flags;
- int power_avg;
int health;
};
--
2.30.2
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH AUTOSEL 4.14 10/31] power: supply: Use IRQF_ONESHOT
[not found] <20210503164204.2854178-1-sashal@kernel.org>
2021-05-03 16:41 ` [PATCH AUTOSEL 4.14 05/31] power: supply: bq27xxx: fix power_avg for newer ICs Sasha Levin
@ 2021-05-03 16:41 ` Sasha Levin
2021-05-03 16:41 ` [PATCH AUTOSEL 4.14 20/31] power: supply: generic-adc-battery: fix possible use-after-free in gab_remove() Sasha Levin
2021-05-03 16:41 ` [PATCH AUTOSEL 4.14 21/31] power: supply: s3c_adc_battery: fix possible use-after-free in s3c_adc_bat_remove() Sasha Levin
3 siblings, 0 replies; 4+ messages in thread
From: Sasha Levin @ 2021-05-03 16:41 UTC (permalink / raw)
To: linux-kernel, stable; +Cc: dongjian, Sebastian Reichel, Sasha Levin, linux-pm
From: dongjian <dongjian@yulong.com>
[ Upstream commit 2469b836fa835c67648acad17d62bc805236a6ea ]
Fixes coccicheck error:
drivers/power/supply/pm2301_charger.c:1089:7-27: ERROR:
drivers/power/supply/lp8788-charger.c:502:8-28: ERROR:
drivers/power/supply/tps65217_charger.c:239:8-33: ERROR:
drivers/power/supply/tps65090-charger.c:303:8-33: ERROR:
Threaded IRQ with no primary handler requested without IRQF_ONESHOT
Signed-off-by: dongjian <dongjian@yulong.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/power/supply/lp8788-charger.c | 2 +-
drivers/power/supply/pm2301_charger.c | 2 +-
drivers/power/supply/tps65090-charger.c | 2 +-
drivers/power/supply/tps65217_charger.c | 2 +-
4 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/power/supply/lp8788-charger.c b/drivers/power/supply/lp8788-charger.c
index b8f7dac7ac3f..6dcabbeccde1 100644
--- a/drivers/power/supply/lp8788-charger.c
+++ b/drivers/power/supply/lp8788-charger.c
@@ -529,7 +529,7 @@ static int lp8788_set_irqs(struct platform_device *pdev,
ret = request_threaded_irq(virq, NULL,
lp8788_charger_irq_thread,
- 0, name, pchg);
+ IRQF_ONESHOT, name, pchg);
if (ret)
break;
}
diff --git a/drivers/power/supply/pm2301_charger.c b/drivers/power/supply/pm2301_charger.c
index 78561b6884fc..9ef218d76aa9 100644
--- a/drivers/power/supply/pm2301_charger.c
+++ b/drivers/power/supply/pm2301_charger.c
@@ -1098,7 +1098,7 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
ret = request_threaded_irq(gpio_to_irq(pm2->pdata->gpio_irq_number),
NULL,
pm2xxx_charger_irq[0].isr,
- pm2->pdata->irq_type,
+ pm2->pdata->irq_type | IRQF_ONESHOT,
pm2xxx_charger_irq[0].name, pm2);
if (ret != 0) {
diff --git a/drivers/power/supply/tps65090-charger.c b/drivers/power/supply/tps65090-charger.c
index 1b4b5e09538e..297bf58f0d4f 100644
--- a/drivers/power/supply/tps65090-charger.c
+++ b/drivers/power/supply/tps65090-charger.c
@@ -311,7 +311,7 @@ static int tps65090_charger_probe(struct platform_device *pdev)
if (irq != -ENXIO) {
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
- tps65090_charger_isr, 0, "tps65090-charger", cdata);
+ tps65090_charger_isr, IRQF_ONESHOT, "tps65090-charger", cdata);
if (ret) {
dev_err(cdata->dev,
"Unable to register irq %d err %d\n", irq,
diff --git a/drivers/power/supply/tps65217_charger.c b/drivers/power/supply/tps65217_charger.c
index 1f5234098aaf..7295c1b13f93 100644
--- a/drivers/power/supply/tps65217_charger.c
+++ b/drivers/power/supply/tps65217_charger.c
@@ -250,7 +250,7 @@ static int tps65217_charger_probe(struct platform_device *pdev)
for (i = 0; i < NUM_CHARGER_IRQS; i++) {
ret = devm_request_threaded_irq(&pdev->dev, irq[i], NULL,
tps65217_charger_irq,
- 0, "tps65217-charger",
+ IRQF_ONESHOT, "tps65217-charger",
charger);
if (ret) {
dev_err(charger->dev,
--
2.30.2
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH AUTOSEL 4.14 20/31] power: supply: generic-adc-battery: fix possible use-after-free in gab_remove()
[not found] <20210503164204.2854178-1-sashal@kernel.org>
2021-05-03 16:41 ` [PATCH AUTOSEL 4.14 05/31] power: supply: bq27xxx: fix power_avg for newer ICs Sasha Levin
2021-05-03 16:41 ` [PATCH AUTOSEL 4.14 10/31] power: supply: Use IRQF_ONESHOT Sasha Levin
@ 2021-05-03 16:41 ` Sasha Levin
2021-05-03 16:41 ` [PATCH AUTOSEL 4.14 21/31] power: supply: s3c_adc_battery: fix possible use-after-free in s3c_adc_bat_remove() Sasha Levin
3 siblings, 0 replies; 4+ messages in thread
From: Sasha Levin @ 2021-05-03 16:41 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Yang Yingliang, Hulk Robot, Sebastian Reichel, Sasha Levin,
linux-pm
From: Yang Yingliang <yangyingliang@huawei.com>
[ Upstream commit b6cfa007b3b229771d9588970adb4ab3e0487f49 ]
This driver's remove path calls cancel_delayed_work(). However, that
function does not wait until the work function finishes. This means
that the callback function may still be running after the driver's
remove function has finished, which would result in a use-after-free.
Fix by calling cancel_delayed_work_sync(), which ensures that
the work is properly cancelled, no longer running, and unable
to re-schedule itself.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/power/supply/generic-adc-battery.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/power/supply/generic-adc-battery.c b/drivers/power/supply/generic-adc-battery.c
index 371b5ec70087..c5bde3c24c31 100644
--- a/drivers/power/supply/generic-adc-battery.c
+++ b/drivers/power/supply/generic-adc-battery.c
@@ -384,7 +384,7 @@ static int gab_remove(struct platform_device *pdev)
}
kfree(adc_bat->psy_desc.properties);
- cancel_delayed_work(&adc_bat->bat_work);
+ cancel_delayed_work_sync(&adc_bat->bat_work);
return 0;
}
--
2.30.2
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH AUTOSEL 4.14 21/31] power: supply: s3c_adc_battery: fix possible use-after-free in s3c_adc_bat_remove()
[not found] <20210503164204.2854178-1-sashal@kernel.org>
` (2 preceding siblings ...)
2021-05-03 16:41 ` [PATCH AUTOSEL 4.14 20/31] power: supply: generic-adc-battery: fix possible use-after-free in gab_remove() Sasha Levin
@ 2021-05-03 16:41 ` Sasha Levin
3 siblings, 0 replies; 4+ messages in thread
From: Sasha Levin @ 2021-05-03 16:41 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Yang Yingliang, Hulk Robot, Krzysztof Kozlowski,
Sebastian Reichel, Sasha Levin, linux-samsung-soc, linux-pm
From: Yang Yingliang <yangyingliang@huawei.com>
[ Upstream commit 68ae256945d2abe9036a7b68af4cc65aff79d5b7 ]
This driver's remove path calls cancel_delayed_work(). However, that
function does not wait until the work function finishes. This means
that the callback function may still be running after the driver's
remove function has finished, which would result in a use-after-free.
Fix by calling cancel_delayed_work_sync(), which ensures that
the work is properly cancelled, no longer running, and unable
to re-schedule itself.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/power/supply/s3c_adc_battery.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/power/supply/s3c_adc_battery.c b/drivers/power/supply/s3c_adc_battery.c
index 0ffe5cd3abf6..06b412c43aa7 100644
--- a/drivers/power/supply/s3c_adc_battery.c
+++ b/drivers/power/supply/s3c_adc_battery.c
@@ -392,7 +392,7 @@ static int s3c_adc_bat_remove(struct platform_device *pdev)
gpio_free(pdata->gpio_charge_finished);
}
- cancel_delayed_work(&bat_work);
+ cancel_delayed_work_sync(&bat_work);
if (pdata->exit)
pdata->exit();
--
2.30.2
^ permalink raw reply related [flat|nested] 4+ messages in thread