[media] drivers/media/radio/radio-wl1273.c: use devm_ functions

The various devm_ functions allocate memory that is released when a driver
detaches.  This patch uses these functions for data that is allocated in
the probe function of a platform device and is only freed in the remove
function.

In two cases, the original memory allocation function was kmalloc, which
has been changed to a zeroing allocation to benefit from the devm function.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 7 insertions, 16 deletions

diff --git a/drivers/media/radio/radio-wl1273.c b/drivers/media/radio/radio-wl1273.c
index e8428f573ccd..a22ad1c1f3d5 100644
--- a/drivers/media/radio/radio-wl1273.c
+++ b/drivers/media/radio/radio-wl1273.c
@@ -1983,9 +1983,6 @@ static int wl1273_fm_radio_remove(struct platform_device *pdev)
         v4l2_ctrl_handler_free(&radio->ctrl_handler);
         video_unregister_device(&radio->videodev);
         v4l2_device_unregister(&radio->v4l2dev);
-        kfree(radio->buffer);
-        kfree(radio->write_buf);
-        kfree(radio);
 
         return 0;
 }
@@ -2005,7 +2002,7 @@ static int __devinit wl1273_fm_radio_probe(struct platform_device *pdev)
                 goto pdata_err;
         }
 
-        radio = kzalloc(sizeof(*radio), GFP_KERNEL);
+        radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
         if (!radio) {
                 r = -ENOMEM;
                 goto pdata_err;
@@ -2013,11 +2010,11 @@ static int __devinit wl1273_fm_radio_probe(struct platform_device *pdev)
 
         /* RDS buffer allocation */
         radio->buf_size = rds_buf * RDS_BLOCK_SIZE;
-        radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
+        radio->buffer = devm_kzalloc(&pdev->dev, radio->buf_size, GFP_KERNEL);
         if (!radio->buffer) {
                 pr_err("Cannot allocate memory for RDS buffer.\n");
                 r = -ENOMEM;
-                goto err_kmalloc;
+                goto pdata_err;
         }
 
         radio->core = *core;
@@ -2043,7 +2040,7 @@ static int __devinit wl1273_fm_radio_probe(struct platform_device *pdev)
                 if (r) {
                         dev_err(radio->dev, WL1273_FM_DRIVER_NAME
                                 ": Cannot get platform data\n");
-                        goto err_resources;
+                        goto pdata_err;
                 }
 
                 dev_dbg(radio->dev, "irq: %d\n", radio->core->client->irq);
@@ -2061,13 +2058,13 @@ static int __devinit wl1273_fm_radio_probe(struct platform_device *pdev)
                 dev_err(radio->dev, WL1273_FM_DRIVER_NAME ": Core WL1273 IRQ"
                         " not configured");
                 r = -EINVAL;
-                goto err_resources;
+                goto pdata_err;
         }
 
         init_completion(&radio->busy);
         init_waitqueue_head(&radio->read_queue);
 
-        radio->write_buf = kmalloc(256, GFP_KERNEL);
+        radio->write_buf = devm_kzalloc(&pdev->dev, 256, GFP_KERNEL);
         if (!radio->write_buf) {
                 r = -ENOMEM;
                 goto write_buf_err;
@@ -2080,7 +2077,7 @@ static int __devinit wl1273_fm_radio_probe(struct platform_device *pdev)
         r = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
         if (r) {
                 dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
-                goto device_register_err;
+                goto write_buf_err;
         }
 
         /* V4L2 configuration */
@@ -2135,16 +2132,10 @@ static int __devinit wl1273_fm_radio_probe(struct platform_device *pdev)
 handler_init_err:
         v4l2_ctrl_handler_free(&radio->ctrl_handler);
         v4l2_device_unregister(&radio->v4l2dev);
-device_register_err:
-        kfree(radio->write_buf);
 write_buf_err:
         free_irq(radio->core->client->irq, radio);
 err_request_irq:
         radio->core->pdata->free_resources();
-err_resources:
-        kfree(radio->buffer);
-err_kmalloc:
-        kfree(radio);
 pdata_err:
         return r;
 }