Input: intel-mid-touch - switch to using managed resources
Let's switch the driver to use managed resources, this will simplify
error handling and driver unbinding logic.
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/touchscreen/intel-mid-touch.c b/drivers/input/touchscreen/intel-mid-touch.c
index 4f6b156..c38ca4a 100644
--- a/drivers/input/touchscreen/intel-mid-touch.c
+++ b/drivers/input/touchscreen/intel-mid-touch.c
@@ -36,6 +36,7 @@
#include <linux/irq.h>
#include <linux/delay.h>
#include <asm/intel_scu_ipc.h>
+#include <linux/device.h>
/* PMIC Interrupt registers */
#define PMIC_REG_ID1 0x00 /* PMIC ID1 register */
@@ -580,12 +581,17 @@
return -EINVAL;
}
- tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL);
- input = input_allocate_device();
- if (!tsdev || !input) {
+ tsdev = devm_kzalloc(&pdev->dev, sizeof(struct mrstouch_dev),
+ GFP_KERNEL);
+ if (!tsdev) {
dev_err(&pdev->dev, "unable to allocate memory\n");
- err = -ENOMEM;
- goto err_free_mem;
+ return -ENOMEM;
+ }
+
+ input = devm_input_allocate_device(&pdev->dev);
+ if (!input) {
+ dev_err(&pdev->dev, "unable to allocate input device\n");
+ return -ENOMEM;
}
tsdev->dev = &pdev->dev;
@@ -598,7 +604,7 @@
err = mrstouch_adc_init(tsdev);
if (err) {
dev_err(&pdev->dev, "ADC initialization failed\n");
- goto err_free_mem;
+ return err;
}
input->name = "mrst_touchscreen";
@@ -618,38 +624,20 @@
input_set_abs_params(tsdev->input, ABS_PRESSURE,
MRST_PRESSURE_MIN, MRST_PRESSURE_MAX, 0, 0);
- err = request_threaded_irq(tsdev->irq, NULL, mrstouch_pendet_irq,
- IRQF_ONESHOT, "mrstouch", tsdev);
+ err = devm_request_threaded_irq(&pdev->dev, tsdev->irq, NULL,
+ mrstouch_pendet_irq, IRQF_ONESHOT,
+ "mrstouch", tsdev);
if (err) {
dev_err(tsdev->dev, "unable to allocate irq\n");
- goto err_free_mem;
+ return err;
}
err = input_register_device(tsdev->input);
if (err) {
dev_err(tsdev->dev, "unable to register input device\n");
- goto err_free_irq;
+ return err;
}
- platform_set_drvdata(pdev, tsdev);
- return 0;
-
-err_free_irq:
- free_irq(tsdev->irq, tsdev);
-err_free_mem:
- input_free_device(input);
- kfree(tsdev);
- return err;
-}
-
-static int mrstouch_remove(struct platform_device *pdev)
-{
- struct mrstouch_dev *tsdev = platform_get_drvdata(pdev);
-
- free_irq(tsdev->irq, tsdev);
- input_unregister_device(tsdev->input);
- kfree(tsdev);
-
return 0;
}
@@ -659,7 +647,6 @@
.owner = THIS_MODULE,
},
.probe = mrstouch_probe,
- .remove = mrstouch_remove,
};
module_platform_driver(mrstouch_driver);