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Revert "power: supply: qcom_battmgr: Register the power supplies afte…
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…r PDR is up"

This reverts commit b43f7dd.

The offending commit deferred power-supply class device registration
until the service-started notification is received.

This triggers a NULL pointer dereference during boot of the Lenovo
ThinkPad X13s and SC8280XP CRD as battery status notifications can be
received before the service-start notification:

	Unable to handle kernel NULL pointer dereference at virtual address 00000000000005c0
	...
	Call trace:
	 _acquire+0x338/0x2064
	 acquire+0x1e8/0x318
	 spin_lock_irqsave+0x60/0x88
	 _supply_changed+0x2c/0xa4
	 battmgr_callback+0x1d4/0x60c [qcom_battmgr]
	 pmic_glink_rpmsg_callback+0x5c/0xa4 [pmic_glink]
	 qcom_glink_native_rx+0x58c/0x7e8
	 qcom_glink_smem_intr+0x14/0x24 [qcom_glink_smem]
	 __handle_irq_event_percpu+0xb0/0x2d4
	 handle_irq_event+0x4c/0xb8

As trying to serialise this is non-trivial and risks missing
notifications, let's revert to registration during probe so that the
driver data is all set up once the service goes live.

The warning message during resume in case the aDSP firmware is not
running that motivated the change can be considered a feature and should
not be suppressed.

Fixes: b43f7dd ("power: supply: qcom_battmgr: Register the power supplies after PDR is up")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240123160053.18331-1-johan+linaro@kernel.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
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Johan Hovold authored and Sebastian Reichel committed Jan 26, 2024
1 parent 6613476 commit d0266d7
Showing 1 changed file with 49 additions and 60 deletions.
109 changes: 49 additions & 60 deletions drivers/power/supply/qcom_battmgr.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -282,7 +282,6 @@ struct qcom_battmgr_wireless {

struct qcom_battmgr {
struct device *dev;
struct auxiliary_device *adev;
struct pmic_glink_client *client;

enum qcom_battmgr_variant variant;
Expand Down Expand Up @@ -1294,69 +1293,11 @@ static void qcom_battmgr_enable_worker(struct work_struct *work)
dev_err(battmgr->dev, "failed to request power notifications\n");
}

static char *qcom_battmgr_battery[] = { "battery" };

static void qcom_battmgr_register_psy(struct qcom_battmgr *battmgr)
{
struct power_supply_config psy_cfg_supply = {};
struct auxiliary_device *adev = battmgr->adev;
struct power_supply_config psy_cfg = {};
struct device *dev = &adev->dev;

psy_cfg.drv_data = battmgr;
psy_cfg.of_node = adev->dev.of_node;

psy_cfg_supply.drv_data = battmgr;
psy_cfg_supply.of_node = adev->dev.of_node;
psy_cfg_supply.supplied_to = qcom_battmgr_battery;
psy_cfg_supply.num_supplicants = 1;

if (battmgr->variant == QCOM_BATTMGR_SC8280XP) {
battmgr->bat_psy = devm_power_supply_register(dev, &sc8280xp_bat_psy_desc, &psy_cfg);
if (IS_ERR(battmgr->bat_psy))
dev_err(dev, "failed to register battery power supply (%ld)\n",
PTR_ERR(battmgr->bat_psy));

battmgr->ac_psy = devm_power_supply_register(dev, &sc8280xp_ac_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->ac_psy))
dev_err(dev, "failed to register AC power supply (%ld)\n",
PTR_ERR(battmgr->ac_psy));

battmgr->usb_psy = devm_power_supply_register(dev, &sc8280xp_usb_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->usb_psy))
dev_err(dev, "failed to register USB power supply (%ld)\n",
PTR_ERR(battmgr->usb_psy));

battmgr->wls_psy = devm_power_supply_register(dev, &sc8280xp_wls_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->wls_psy))
dev_err(dev, "failed to register wireless charing power supply (%ld)\n",
PTR_ERR(battmgr->wls_psy));
} else {
battmgr->bat_psy = devm_power_supply_register(dev, &sm8350_bat_psy_desc, &psy_cfg);
if (IS_ERR(battmgr->bat_psy))
dev_err(dev, "failed to register battery power supply (%ld)\n",
PTR_ERR(battmgr->bat_psy));

battmgr->usb_psy = devm_power_supply_register(dev, &sm8350_usb_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->usb_psy))
dev_err(dev, "failed to register USB power supply (%ld)\n",
PTR_ERR(battmgr->usb_psy));

battmgr->wls_psy = devm_power_supply_register(dev, &sm8350_wls_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->wls_psy))
dev_err(dev, "failed to register wireless charing power supply (%ld)\n",
PTR_ERR(battmgr->wls_psy));
}
}

static void qcom_battmgr_pdr_notify(void *priv, int state)
{
struct qcom_battmgr *battmgr = priv;

if (state == SERVREG_SERVICE_STATE_UP) {
if (!battmgr->bat_psy)
qcom_battmgr_register_psy(battmgr);

battmgr->service_up = true;
schedule_work(&battmgr->enable_work);
} else {
Expand All @@ -1371,9 +1312,13 @@ static const struct of_device_id qcom_battmgr_of_variants[] = {
{}
};

static char *qcom_battmgr_battery[] = { "battery" };

static int qcom_battmgr_probe(struct auxiliary_device *adev,
const struct auxiliary_device_id *id)
{
struct power_supply_config psy_cfg_supply = {};
struct power_supply_config psy_cfg = {};
const struct of_device_id *match;
struct qcom_battmgr *battmgr;
struct device *dev = &adev->dev;
Expand All @@ -1383,7 +1328,14 @@ static int qcom_battmgr_probe(struct auxiliary_device *adev,
return -ENOMEM;

battmgr->dev = dev;
battmgr->adev = adev;

psy_cfg.drv_data = battmgr;
psy_cfg.of_node = adev->dev.of_node;

psy_cfg_supply.drv_data = battmgr;
psy_cfg_supply.of_node = adev->dev.of_node;
psy_cfg_supply.supplied_to = qcom_battmgr_battery;
psy_cfg_supply.num_supplicants = 1;

INIT_WORK(&battmgr->enable_work, qcom_battmgr_enable_worker);
mutex_init(&battmgr->lock);
Expand All @@ -1395,6 +1347,43 @@ static int qcom_battmgr_probe(struct auxiliary_device *adev,
else
battmgr->variant = QCOM_BATTMGR_SM8350;

if (battmgr->variant == QCOM_BATTMGR_SC8280XP) {
battmgr->bat_psy = devm_power_supply_register(dev, &sc8280xp_bat_psy_desc, &psy_cfg);
if (IS_ERR(battmgr->bat_psy))
return dev_err_probe(dev, PTR_ERR(battmgr->bat_psy),
"failed to register battery power supply\n");

battmgr->ac_psy = devm_power_supply_register(dev, &sc8280xp_ac_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->ac_psy))
return dev_err_probe(dev, PTR_ERR(battmgr->ac_psy),
"failed to register AC power supply\n");

battmgr->usb_psy = devm_power_supply_register(dev, &sc8280xp_usb_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->usb_psy))
return dev_err_probe(dev, PTR_ERR(battmgr->usb_psy),
"failed to register USB power supply\n");

battmgr->wls_psy = devm_power_supply_register(dev, &sc8280xp_wls_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->wls_psy))
return dev_err_probe(dev, PTR_ERR(battmgr->wls_psy),
"failed to register wireless charing power supply\n");
} else {
battmgr->bat_psy = devm_power_supply_register(dev, &sm8350_bat_psy_desc, &psy_cfg);
if (IS_ERR(battmgr->bat_psy))
return dev_err_probe(dev, PTR_ERR(battmgr->bat_psy),
"failed to register battery power supply\n");

battmgr->usb_psy = devm_power_supply_register(dev, &sm8350_usb_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->usb_psy))
return dev_err_probe(dev, PTR_ERR(battmgr->usb_psy),
"failed to register USB power supply\n");

battmgr->wls_psy = devm_power_supply_register(dev, &sm8350_wls_psy_desc, &psy_cfg_supply);
if (IS_ERR(battmgr->wls_psy))
return dev_err_probe(dev, PTR_ERR(battmgr->wls_psy),
"failed to register wireless charing power supply\n");
}

battmgr->client = devm_pmic_glink_register_client(dev,
PMIC_GLINK_OWNER_BATTMGR,
qcom_battmgr_callback,
Expand Down

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