i2c: pnx: Use devm_*() functions

Use devm_*() functions to make cleanup paths simpler,
and remove redundant return value check of platform_get_resource()
because the value is checked by devm_ioremap_resource().

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

1 files changed, 13 insertions, 51 deletions

diff --git a/drivers/i2c/busses/i2c-pnx.c b/drivers/i2c/busses/i2c-pnx.c
index c9a352f0a9a5..dc7ff829ad78 100644
--- a/drivers/i2c/busses/i2c-pnx.c
+++ b/drivers/i2c/busses/i2c-pnx.c
@@ -628,11 +628,9 @@ static int i2c_pnx_probe(struct platform_device *pdev)
         struct resource *res;
         u32 speed = I2C_PNX_SPEED_KHZ_DEFAULT * 1000;
 
-        alg_data = kzalloc(sizeof(*alg_data), GFP_KERNEL);
-        if (!alg_data) {
-                ret = -ENOMEM;
-                goto err_kzalloc;
-        }
+        alg_data = devm_kzalloc(&pdev->dev, sizeof(*alg_data), GFP_KERNEL);
+        if (!alg_data)
+                return -ENOMEM;
 
         platform_set_drvdata(pdev, alg_data);
 
@@ -657,11 +655,9 @@ static int i2c_pnx_probe(struct platform_device *pdev)
                  */
         }
 #endif
-        alg_data->clk = clk_get(&pdev->dev, NULL);
-        if (IS_ERR(alg_data->clk)) {
-                ret = PTR_ERR(alg_data->clk);
-                goto out_drvdata;
-        }
+        alg_data->clk = devm_clk_get(&pdev->dev, NULL);
+        if (IS_ERR(alg_data->clk))
+                return PTR_ERR(alg_data->clk);
 
         init_timer(&alg_data->mif.timer);
         alg_data->mif.timer.function = i2c_pnx_timeout;
@@ -672,31 +668,13 @@ static int i2c_pnx_probe(struct platform_device *pdev)
 
         /* Register I/O resource */
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                dev_err(&pdev->dev, "Unable to get mem resource.\n");
-                ret = -EBUSY;
-                goto out_clkget;
-        }
-        if (!request_mem_region(res->start, I2C_PNX_REGION_SIZE,
-                                pdev->name)) {
-                dev_err(&pdev->dev,
-                       "I/O region 0x%08x for I2C already in use.\n",
-                       res->start);
-                ret = -ENOMEM;
-                goto out_clkget;
-        }
-
-        alg_data->base = res->start;
-        alg_data->ioaddr = ioremap(res->start, I2C_PNX_REGION_SIZE);
-        if (!alg_data->ioaddr) {
-                dev_err(&pdev->dev, "Couldn't ioremap I2C I/O region\n");
-                ret = -ENOMEM;
-                goto out_release;
-        }
+        alg_data->ioaddr = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(alg_data->ioaddr))
+                return PTR_ERR(alg_data->ioaddr);
 
         ret = clk_enable(alg_data->clk);
         if (ret)
-                goto out_unmap;
+                return ret;
 
         freq = clk_get_rate(alg_data->clk);
 
@@ -730,8 +708,8 @@ static int i2c_pnx_probe(struct platform_device *pdev)
                 ret = alg_data->irq;
                 goto out_clock;
         }
-        ret = request_irq(alg_data->irq, i2c_pnx_interrupt,
-                        0, pdev->name, alg_data);
+        ret = devm_request_irq(&pdev->dev, alg_data->irq, i2c_pnx_interrupt,
+                               0, pdev->name, alg_data);
         if (ret)
                 goto out_clock;
 
@@ -739,7 +717,7 @@ static int i2c_pnx_probe(struct platform_device *pdev)
         ret = i2c_add_numbered_adapter(&alg_data->adapter);
         if (ret < 0) {
                 dev_err(&pdev->dev, "I2C: Failed to add bus\n");
-                goto out_irq;
+                goto out_clock;
         }
 
         dev_dbg(&pdev->dev, "%s: Master at %#8x, irq %d.\n",
@@ -747,19 +725,8 @@ static int i2c_pnx_probe(struct platform_device *pdev)
 
         return 0;
 
-out_irq:
-        free_irq(alg_data->irq, alg_data);
 out_clock:
         clk_disable(alg_data->clk);
-out_unmap:
-        iounmap(alg_data->ioaddr);
-out_release:
-        release_mem_region(res->start, I2C_PNX_REGION_SIZE);
-out_clkget:
-        clk_put(alg_data->clk);
-out_drvdata:
-        kfree(alg_data);
-err_kzalloc:
         return ret;
 }
 
@@ -767,13 +734,8 @@ static int i2c_pnx_remove(struct platform_device *pdev)
 {
         struct i2c_pnx_algo_data *alg_data = platform_get_drvdata(pdev);
 
-        free_irq(alg_data->irq, alg_data);
         i2c_del_adapter(&alg_data->adapter);
         clk_disable(alg_data->clk);
-        iounmap(alg_data->ioaddr);
-        release_mem_region(alg_data->base, I2C_PNX_REGION_SIZE);
-        clk_put(alg_data->clk);
-        kfree(alg_data);
 
         return 0;
 }