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authorLars-Peter Clausen <lars@metafoo.de>2009-10-08 00:24:54 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2009-12-13 19:21:28 +0100
commit24213ae19aed6307e309125cc5fcb14e52e475ed (patch)
tree579f1ba4e46976942aee8950bc91ec8ca4599a0a /drivers/mfd/pcf50633-core.c
parent4e8b70265c069544beb5a63b38544b53035b395e (diff)
mfd: Cleanup pcf50633_probe error handling
Currently the child devices were not freed if the irq could not be requested. This patch restructures the function, that in case of an error all previously allocated resources are freed. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Paul Fertser <fercerpav@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/pcf50633-core.c')
-rw-r--r--drivers/mfd/pcf50633-core.c43
1 files changed, 26 insertions, 17 deletions
diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
index f109551eedad..03dcc9200707 100644
--- a/drivers/mfd/pcf50633-core.c
+++ b/drivers/mfd/pcf50633-core.c
@@ -553,9 +553,14 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
{
struct pcf50633 *pcf;
struct pcf50633_platform_data *pdata = client->dev.platform_data;
- int i, ret = 0;
+ int i, ret;
int version, variant;
+ if (!client->irq) {
+ dev_err(&client->dev, "Missing IRQ\n");
+ return -ENOENT;
+ }
+
pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
if (!pcf)
return -ENOMEM;
@@ -570,6 +575,12 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
pcf->irq = client->irq;
pcf->work_queue = create_singlethread_workqueue("pcf50633");
+ if (!pcf->work_queue) {
+ dev_err(&client->dev, "Failed to alloc workqueue\n");
+ ret = -ENOMEM;
+ goto err_free;
+ }
+
INIT_WORK(&pcf->irq_work, pcf50633_irq_worker);
version = pcf50633_reg_read(pcf, 0);
@@ -577,7 +588,7 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
if (version < 0 || variant < 0) {
dev_err(pcf->dev, "Unable to probe pcf50633\n");
ret = -ENODEV;
- goto err;
+ goto err_destroy_workqueue;
}
dev_info(pcf->dev, "Probed device version %d variant %d\n",
@@ -591,6 +602,14 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
pcf50633_reg_write(pcf, PCF50633_REG_INT4M, 0x00);
pcf50633_reg_write(pcf, PCF50633_REG_INT5M, 0x00);
+ ret = request_irq(client->irq, pcf50633_irq,
+ IRQF_TRIGGER_LOW, "pcf50633", pcf);
+
+ if (ret) {
+ dev_err(pcf->dev, "Failed to request IRQ %d\n", ret);
+ goto err_destroy_workqueue;
+ }
+
/* Create sub devices */
pcf50633_client_dev_register(pcf, "pcf50633-input",
&pcf->input_pdev);
@@ -606,7 +625,7 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
pdev = platform_device_alloc("pcf50633-regltr", i);
if (!pdev) {
- dev_err(pcf->dev, "Cannot create regulator\n");
+ dev_err(pcf->dev, "Cannot create regulator %d\n", i);
continue;
}
@@ -618,19 +637,6 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
platform_device_add(pdev);
}
- if (client->irq) {
- ret = request_irq(client->irq, pcf50633_irq,
- IRQF_TRIGGER_LOW, "pcf50633", pcf);
-
- if (ret) {
- dev_err(pcf->dev, "Failed to request IRQ %d\n", ret);
- goto err;
- }
- } else {
- dev_err(pcf->dev, "No IRQ configured\n");
- goto err;
- }
-
if (enable_irq_wake(client->irq) < 0)
dev_err(pcf->dev, "IRQ %u cannot be enabled as wake-up source"
"in this hardware revision", client->irq);
@@ -644,9 +650,12 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
return 0;
-err:
+err_destroy_workqueue:
destroy_workqueue(pcf->work_queue);
+err_free:
+ i2c_set_clientdata(client, NULL);
kfree(pcf);
+
return ret;
}