Convert driver to use devm_*() APIs so rely on driver model core layer to manage resources. This eliminates error path boilerplate and makes code neat.
This patch also fixes the memory leakage for 'kmi->io' when remove module.
Signed-off-by: Leo Yan leo.yan@linaro.org --- drivers/input/serio/ambakmi.c | 44 ++++++++++--------------------------------- 1 file changed, 10 insertions(+), 34 deletions(-)
diff --git a/drivers/input/serio/ambakmi.c b/drivers/input/serio/ambakmi.c index c6606ca..d4814be 100644 --- a/drivers/input/serio/ambakmi.c +++ b/drivers/input/serio/ambakmi.c @@ -112,19 +112,11 @@ static int amba_kmi_probe(struct amba_device *dev, { struct amba_kmi_port *kmi; struct serio *io; - int ret; - - ret = amba_request_regions(dev, NULL); - if (ret) - return ret; - - kmi = kzalloc(sizeof(struct amba_kmi_port), GFP_KERNEL); - io = kzalloc(sizeof(struct serio), GFP_KERNEL); - if (!kmi || !io) { - ret = -ENOMEM; - goto out; - }
+ kmi = devm_kzalloc(&dev->dev, sizeof(*kmi), GFP_KERNEL); + io = devm_kzalloc(&dev->dev, sizeof(*io), GFP_KERNEL); + if (!kmi || !io) + return -ENOMEM;
io->id.type = SERIO_8042; io->write = amba_kmi_write; @@ -136,31 +128,19 @@ static int amba_kmi_probe(struct amba_device *dev, io->dev.parent = &dev->dev;
kmi->io = io; - kmi->base = ioremap(dev->res.start, resource_size(&dev->res)); - if (!kmi->base) { - ret = -ENOMEM; - goto out; - } + kmi->base = devm_ioremap_resource(&dev->dev, &dev->res); + if (IS_ERR(kmi->base)) + return PTR_ERR(kmi->base);
- kmi->clk = clk_get(&dev->dev, "KMIREFCLK"); - if (IS_ERR(kmi->clk)) { - ret = PTR_ERR(kmi->clk); - goto unmap; - } + kmi->clk = devm_clk_get(&dev->dev, "KMIREFCLK"); + if (IS_ERR(kmi->clk)) + return PTR_ERR(kmi->clk);
kmi->irq = dev->irq[0]; amba_set_drvdata(dev, kmi);
serio_register_port(kmi->io); return 0; - - unmap: - iounmap(kmi->base); - out: - kfree(kmi); - kfree(io); - amba_release_regions(dev); - return ret; }
static int amba_kmi_remove(struct amba_device *dev) @@ -168,10 +148,6 @@ static int amba_kmi_remove(struct amba_device *dev) struct amba_kmi_port *kmi = amba_get_drvdata(dev);
serio_unregister_port(kmi->io); - clk_put(kmi->clk); - iounmap(kmi->base); - kfree(kmi); - amba_release_regions(dev); return 0; }