On Thu, Jun 21, 2012 at 03:38:44PM +0530, Shubhrajyoti D wrote: > The various devm_* functions allocate memory that is released when a driver > detaches. This patch uses devm_kzalloc, devm_request_and_ioremap for data > that is allocated in the probe function of a platform device and is only > freed in the remove function. > > Signed-off-by: Shubhrajyoti D <shubhrajyoti@xxxxxx> this looks a lot like: http://marc.info/?l=linux-omap&m=133969143407572&w=2 I wonder why wasn't that one used instead ? > --- > drivers/i2c/busses/i2c-omap.c | 33 +++++++++------------------------ > 1 files changed, 9 insertions(+), 24 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c > index d704f64..328a022 100644 > --- a/drivers/i2c/busses/i2c-omap.c > +++ b/drivers/i2c/busses/i2c-omap.c > @@ -943,7 +943,7 @@ omap_i2c_probe(struct platform_device *pdev) > { > struct omap_i2c_dev *dev; > struct i2c_adapter *adap; > - struct resource *mem, *irq, *ioarea; > + struct resource *mem, *irq; > struct omap_i2c_bus_platform_data *pdata = pdev->dev.platform_data; > struct device_node *node = pdev->dev.of_node; > const struct of_device_id *match; > @@ -962,17 +962,16 @@ omap_i2c_probe(struct platform_device *pdev) > return -ENODEV; > } > > - ioarea = request_mem_region(mem->start, resource_size(mem), > - pdev->name); > - if (!ioarea) { > - dev_err(&pdev->dev, "I2C region already claimed\n"); > - return -EBUSY; > + dev = devm_kzalloc(&pdev->dev, sizeof(struct omap_i2c_dev), GFP_KERNEL); > + if (!dev) { > + dev_err(&pdev->dev, "Menory allocation failed\n"); > + return -ENOMEM; > } > > - dev = kzalloc(sizeof(struct omap_i2c_dev), GFP_KERNEL); > - if (!dev) { > - r = -ENOMEM; > - goto err_release_region; > + dev->base = devm_request_and_ioremap(&pdev->dev, mem); > + if (!dev->base) { > + dev_err(&pdev->dev, "I2C region already claimed\n"); > + return -ENOMEM; > } > > match = of_match_device(of_match_ptr(omap_i2c_of_match), &pdev->dev); > @@ -996,11 +995,6 @@ omap_i2c_probe(struct platform_device *pdev) > > dev->dev = &pdev->dev; > dev->irq = irq->start; > - dev->base = ioremap(mem->start, resource_size(mem)); > - if (!dev->base) { > - r = -ENOMEM; > - goto err_free_mem; > - } > > platform_set_drvdata(pdev, dev); > > @@ -1095,13 +1089,9 @@ err_free_irq: > err_unuse_clocks: > omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0); > pm_runtime_put(dev->dev); > - iounmap(dev->base); > pm_runtime_disable(&pdev->dev); > err_free_mem: > platform_set_drvdata(pdev, NULL); > - kfree(dev); > -err_release_region: > - release_mem_region(mem->start, resource_size(mem)); > > return r; > } > @@ -1109,7 +1099,6 @@ err_release_region: > static int __devexit omap_i2c_remove(struct platform_device *pdev) > { > struct omap_i2c_dev *dev = platform_get_drvdata(pdev); > - struct resource *mem; > int ret; > > platform_set_drvdata(pdev, NULL); > @@ -1123,10 +1112,6 @@ static int __devexit omap_i2c_remove(struct platform_device *pdev) > omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0); > pm_runtime_put(&pdev->dev); > pm_runtime_disable(&pdev->dev); > - iounmap(dev->base); > - kfree(dev); > - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); > - release_mem_region(mem->start, resource_size(mem)); > return 0; > } > > -- > 1.7.5.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- balbi
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