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Date: Thu, 23 May 2013 20:00:08 +0800
From: Libo Chen <libo.chen@...wei.com>
To: <wsa@...-dreams.de>
CC: <guz.fnst@...fujitsu.com>, <sonic.zhang@...log.com>,
<linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<lizefan@...wei.com>, <libo.chen@...wei.com>
Subject: [PATCH RFC v3 2/3] i2c: pxa: convert to devm_* API
when i2c malloc faild, we should not try to call release_mem_region.
aovid this, convert them to devm_* API.
Signed-off-by: Libo Chen <libo.chen@...wei.com>
---
drivers/i2c/busses/i2c-pxa.c | 63 ++++++++++--------------------------------
1 files changed, 15 insertions(+), 48 deletions(-)
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index ea6d45d..7b10102 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -1091,10 +1091,9 @@ static int i2c_pxa_probe(struct platform_device *dev)
struct resource *res = NULL;
int ret, irq;
- i2c = kzalloc(sizeof(struct pxa_i2c), GFP_KERNEL);
+ i2c = devm_kzalloc(&dev->dev, sizeof(struct pxa_i2c), GFP_KERNEL);
if (!i2c) {
- ret = -ENOMEM;
- goto emalloc;
+ return -ENOMEM;
}
/* Default adapter num to device id; i2c_pxa_probe_dt can override. */
@@ -1104,19 +1103,11 @@ static int i2c_pxa_probe(struct platform_device *dev)
if (ret > 0)
ret = i2c_pxa_probe_pdata(dev, i2c, &i2c_type);
if (ret < 0)
- goto eclk;
+ return ret;
- res = platform_get_resource(dev, IORESOURCE_MEM, 0);
irq = platform_get_irq(dev, 0);
- if (res == NULL || irq < 0) {
- ret = -ENODEV;
- goto eclk;
- }
-
- if (!request_mem_region(res->start, resource_size(res), res->name)) {
- ret = -ENOMEM;
- goto eclk;
- }
+ if (irq < 0)
+ return -ENODEV;
i2c->adap.owner = THIS_MODULE;
i2c->adap.retries = 5;
@@ -1126,17 +1117,15 @@ static int i2c_pxa_probe(struct platform_device *dev)
strlcpy(i2c->adap.name, "pxa_i2c-i2c", sizeof(i2c->adap.name));
- i2c->clk = clk_get(&dev->dev, NULL);
+ i2c->clk = devm_clk_get(&dev->dev, NULL);
if (IS_ERR(i2c->clk)) {
- ret = PTR_ERR(i2c->clk);
- goto eclk;
+ return PTR_ERR(i2c->clk);
}
- i2c->reg_base = ioremap(res->start, resource_size(res));
- if (!i2c->reg_base) {
- ret = -EIO;
- goto eremap;
- }
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ i2c->reg_base = devm_ioremap_resource(&dev->dev, res);
+ if (IS_ERR(i2c->reg_base))
+ return PTR_ERR(i2c->reg_bas);
i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[i2c_type].ibmr;
i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr;
@@ -1166,10 +1155,10 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->adap.algo = &i2c_pxa_pio_algorithm;
} else {
i2c->adap.algo = &i2c_pxa_algorithm;
- ret = request_irq(irq, i2c_pxa_handler, IRQF_SHARED,
- dev_name(&dev->dev), i2c);
+ ret = devm_request_irq(&dev->dev, irq, i2c_pxa_handler,
+ IRQF_SHARED, dev_name(&dev->dev), i2c);
if (ret)
- goto ereqirq;
+ return ret;
}
i2c_pxa_reset(i2c);
@@ -1183,7 +1172,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
ret = i2c_add_numbered_adapter(&i2c->adap);
if (ret < 0) {
printk(KERN_INFO "I2C: Failed to add bus\n");
- goto eadapt;
+ return ret;
}
of_i2c_register_devices(&i2c->adap);
@@ -1198,19 +1187,6 @@ static int i2c_pxa_probe(struct platform_device *dev)
#endif
return 0;
-eadapt:
- if (!i2c->use_pio)
- free_irq(irq, i2c);
-ereqirq:
- clk_disable(i2c->clk);
- iounmap(i2c->reg_base);
-eremap:
- clk_put(i2c->clk);
-eclk:
- kfree(i2c);
-emalloc:
- release_mem_region(res->start, resource_size(res));
- return ret;
}
static int i2c_pxa_remove(struct platform_device *dev)
@@ -1218,15 +1194,6 @@ static int i2c_pxa_remove(struct platform_device *dev)
struct pxa_i2c *i2c = platform_get_drvdata(dev);
i2c_del_adapter(&i2c->adap);
- if (!i2c->use_pio)
- free_irq(i2c->irq, i2c);
-
- clk_disable(i2c->clk);
- clk_put(i2c->clk);
-
- iounmap(i2c->reg_base);
- release_mem_region(i2c->iobase, i2c->iosize);
- kfree(i2c);
return 0;
}
--
1.7.1
--
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