From 7da6334e73fe3c0579d8c6a56001336a430a5d99 Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Thu, 26 Jan 2012 22:58:30 -0800 Subject: [PATCH] lp8727_charger: Add error check routine on probe() Add error checking on initializing registers and interrupt handler. Initializing registers - lp8727_init_device() : check i2c error during probing the driver. Initializing interrupt handler - lp8727_intr_config() : check an error on creating the irq thread. If an error occurs on probing lp8727 driver, allocated lp8727 driver memory is freed. Signed-off-by: Milo(Woogyom) Kim Signed-off-by: Anton Vorontsov --- drivers/power/lp8727_charger.c | 57 +++++++++++++++++++++++----------- 1 file changed, 39 insertions(+), 18 deletions(-) diff --git a/drivers/power/lp8727_charger.c b/drivers/power/lp8727_charger.c index d23a3bcc74d9..6239bd7bcc25 100644 --- a/drivers/power/lp8727_charger.c +++ b/drivers/power/lp8727_charger.c @@ -138,17 +138,22 @@ static int lp8727_is_charger_attached(const char *name, int id) return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0; } -static void lp8727_init_device(struct lp8727_chg *pchg) +static int lp8727_init_device(struct lp8727_chg *pchg) { u8 val; + int ret; val = ID200_EN | ADC_EN | CP_EN; - if (lp8727_i2c_write_byte(pchg, CTRL1, &val)) - dev_err(pchg->dev, "i2c write err : addr=0x%.2x\n", CTRL1); + ret = lp8727_i2c_write_byte(pchg, CTRL1, &val); + if (ret) + return ret; val = INT_EN | CHGDET_EN; - if (lp8727_i2c_write_byte(pchg, CTRL2, &val)) - dev_err(pchg->dev, "i2c write err : addr=0x%.2x\n", CTRL2); + ret = lp8727_i2c_write_byte(pchg, CTRL2, &val); + if (ret) + return ret; + + return 0; } static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg) @@ -245,20 +250,22 @@ static irqreturn_t lp8727_isr_func(int irq, void *ptr) return IRQ_HANDLED; } -static void lp8727_intr_config(struct lp8727_chg *pchg) +static int lp8727_intr_config(struct lp8727_chg *pchg) { INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func); pchg->irqthread = create_singlethread_workqueue("lp8727-irqthd"); - if (!pchg->irqthread) + if (!pchg->irqthread) { dev_err(pchg->dev, "can not create thread for lp8727\n"); - - if (request_threaded_irq(pchg->client->irq, - NULL, - lp8727_isr_func, - IRQF_TRIGGER_FALLING, "lp8727_irq", pchg)) { - dev_err(pchg->dev, "lp8727 irq can not be registered\n"); + return -ENOMEM; } + + return request_threaded_irq(pchg->client->irq, + NULL, + lp8727_isr_func, + IRQF_TRIGGER_FALLING, + "lp8727_irq", + pchg); } static enum power_supply_property lp8727_charger_prop[] = { @@ -440,15 +447,29 @@ static int lp8727_probe(struct i2c_client *cl, const struct i2c_device_id *id) mutex_init(&pchg->xfer_lock); - lp8727_init_device(pchg); - lp8727_intr_config(pchg); + ret = lp8727_init_device(pchg); + if (ret) { + dev_err(pchg->dev, "i2c communication err: %d", ret); + goto error; + } + + ret = lp8727_intr_config(pchg); + if (ret) { + dev_err(pchg->dev, "irq handler err: %d", ret); + goto error; + } ret = lp8727_register_psy(pchg); - if (ret) - dev_err(pchg->dev, - "can not register power supplies. err=%d", ret); + if (ret) { + dev_err(pchg->dev, "power supplies register err: %d", ret); + goto error; + } return 0; + +error: + kfree(pchg); + return ret; } static int __devexit lp8727_remove(struct i2c_client *cl) -- GitLab