lkml.org 
[lkml]   [2017]   [Mar]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/5] Input: ambakmi - Convert to use devm_*()
Date
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;
}

--
2.7.4
\
 
 \ /
  Last update: 2017-03-26 16:44    [W:0.088 / U:7.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site