[PATCH v4 1/4] Input: cyttsp - use devres managed resource allocations

[Oreste Salerno]

Use devm_() functions for allocating memory, input device and IRQ.

Signed-off-by: Oreste Salerno <oreste.sale...@tomtom.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/drivers/input/touchscreen/cyttsp_core.c 
b/drivers/input/touchscreen/cyttsp_core.c
index 5b74e8b..3c2ee84 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -541,11 +541,11 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops 
*bus_ops,
                goto err_out;
        }
 
-       ts = kzalloc(sizeof(*ts) + xfer_buf_size, GFP_KERNEL);
-       input_dev = input_allocate_device();
+       ts = devm_kzalloc(dev, sizeof(*ts) + xfer_buf_size, GFP_KERNEL);
+       input_dev = devm_input_allocate_device(dev);
        if (!ts || !input_dev) {
                error = -ENOMEM;
-               goto err_free_mem;
+               goto err_out;
        }
 
        ts->dev = dev;
@@ -562,7 +562,7 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops 
*bus_ops,
                if (error) {
                        dev_err(ts->dev, "platform init failed, err: %d\n",
                                error);
-                       goto err_free_mem;
+                       goto err_out;
                }
        }
 
@@ -586,9 +586,9 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops 
*bus_ops,
 
        input_mt_init_slots(input_dev, CY_MAX_ID, 0);
 
-       error = request_threaded_irq(ts->irq, NULL, cyttsp_irq,
-                                    IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-                                    pdata->name, ts);
+       error = devm_request_threaded_irq(dev, ts->irq, NULL, cyttsp_irq,
+                                         IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+                                         pdata->name, ts);
        if (error) {
                dev_err(ts->dev, "failed to request IRQ %d, err: %d\n",
                        ts->irq, error);
@@ -599,25 +599,20 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops 
*bus_ops,
 
        error = cyttsp_power_on(ts);
        if (error)
-               goto err_free_irq;
+               goto err_platform_exit;
 
        error = input_register_device(input_dev);
        if (error) {
                dev_err(ts->dev, "failed to register input device: %d\n",
                        error);
-               goto err_free_irq;
+               goto err_platform_exit;
        }
 
        return ts;
 
-err_free_irq:
-       free_irq(ts->irq, ts);
 err_platform_exit:
        if (pdata->exit)
                pdata->exit();
-err_free_mem:
-       input_free_device(input_dev);
-       kfree(ts);
 err_out:
        return ERR_PTR(error);
 }
@@ -625,11 +620,8 @@ EXPORT_SYMBOL_GPL(cyttsp_probe);
 
 void cyttsp_remove(struct cyttsp *ts)
 {
-       free_irq(ts->irq, ts);
-       input_unregister_device(ts->input);
        if (ts->pdata->exit)
                ts->pdata->exit();
-       kfree(ts);
 }
 EXPORT_SYMBOL_GPL(cyttsp_remove);
 
-- 
1.9.1