From 24213ae19aed6307e309125cc5fcb14e52e475ed Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 8 Oct 2009 00:24:54 +0200 Subject: [PATCH] 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 Signed-off-by: Paul Fertser Signed-off-by: Samuel Ortiz --- drivers/mfd/pcf50633-core.c | 43 ++++++++++++++++++++++--------------- 1 file changed, 26 insertions(+), 17 deletions(-) diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c index f109551eedade..03dcc92007070 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; } -- 2.39.5