From ebbed04fe7f89c9cb00df32f7123bc1b84b456cb Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Tue, 23 Feb 2010 23:38:17 -0800 Subject: [PATCH] Regulators: lp3971 - fail if platform data was not supplied There is no point in completing probe if platform data is missing so let's abort loading early. Also, use kcalloc when allocating several instances of the same data structure and mark setup_regulators() as __devinit since it is only called from lp3971_i2c_probe() which is __devinit. Signed-off-by: Dmitry Torokhov Acked-by: Mark Brown Signed-off-by: Liam Girdwood --- drivers/regulator/lp3971.c | 58 +++++++++++++++++++------------------- 1 file changed, 29 insertions(+), 29 deletions(-) diff --git a/drivers/regulator/lp3971.c b/drivers/regulator/lp3971.c index 3ea639f29e95..f5532ed79272 100644 --- a/drivers/regulator/lp3971.c +++ b/drivers/regulator/lp3971.c @@ -431,20 +431,20 @@ static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val) return ret; } -static int setup_regulators(struct lp3971 *lp3971, - struct lp3971_platform_data *pdata) +static int __devinit setup_regulators(struct lp3971 *lp3971, + struct lp3971_platform_data *pdata) { int i, err; - int num_regulators = pdata->num_regulators; - lp3971->num_regulators = num_regulators; - lp3971->rdev = kzalloc(sizeof(struct regulator_dev *) * num_regulators, - GFP_KERNEL); + + lp3971->num_regulators = pdata->num_regulators; + lp3971->rdev = kcalloc(pdata->num_regulators, + sizeof(struct regulator_dev *), GFP_KERNEL); /* Instantiate the regulators */ - for (i = 0; i < num_regulators; i++) { - int id = pdata->regulators[i].id; - lp3971->rdev[i] = regulator_register(®ulators[id], - lp3971->dev, pdata->regulators[i].initdata, lp3971); + for (i = 0; i < pdata->num_regulators; i++) { + struct lp3971_regulator_subdev *reg = &pdata->regulators[i]; + lp3971->rdev[i] = regulator_register(®ulators[reg->id], + lp3971->dev, reg->initdata, lp3971); if (IS_ERR(lp3971->rdev[i])) { err = PTR_ERR(lp3971->rdev[i]); @@ -455,10 +455,10 @@ static int setup_regulators(struct lp3971 *lp3971, } return 0; + error: - for (i = 0; i < num_regulators; i++) - if (lp3971->rdev[i]) - regulator_unregister(lp3971->rdev[i]); + while (--i >= 0) + regulator_unregister(lp3971->rdev[i]); kfree(lp3971->rdev); lp3971->rdev = NULL; return err; @@ -472,15 +472,17 @@ static int __devinit lp3971_i2c_probe(struct i2c_client *i2c, int ret; u16 val; - lp3971 = kzalloc(sizeof(struct lp3971), GFP_KERNEL); - if (lp3971 == NULL) { - ret = -ENOMEM; - goto err; + if (!pdata) { + dev_dbg(&i2c->dev, "No platform init data supplied\n"); + return -ENODEV; } + lp3971 = kzalloc(sizeof(struct lp3971), GFP_KERNEL); + if (lp3971 == NULL) + return -ENOMEM; + lp3971->i2c = i2c; lp3971->dev = &i2c->dev; - i2c_set_clientdata(i2c, lp3971); mutex_init(&lp3971->io_lock); @@ -493,19 +495,15 @@ static int __devinit lp3971_i2c_probe(struct i2c_client *i2c, goto err_detect; } - if (pdata) { - ret = setup_regulators(lp3971, pdata); - if (ret < 0) - goto err_detect; - } else - dev_warn(lp3971->dev, "No platform init data supplied\n"); + ret = setup_regulators(lp3971, pdata); + if (ret < 0) + goto err_detect; + i2c_set_clientdata(i2c, lp3971); return 0; err_detect: - i2c_set_clientdata(i2c, NULL); kfree(lp3971); -err: return ret; } @@ -513,11 +511,13 @@ static int __devexit lp3971_i2c_remove(struct i2c_client *i2c) { struct lp3971 *lp3971 = i2c_get_clientdata(i2c); int i; + + i2c_set_clientdata(i2c, NULL); + for (i = 0; i < lp3971->num_regulators; i++) - if (lp3971->rdev[i]) - regulator_unregister(lp3971->rdev[i]); + regulator_unregister(lp3971->rdev[i]); + kfree(lp3971->rdev); - i2c_set_clientdata(i2c, NULL); kfree(lp3971); return 0; -- 2.30.2