[PATCH v4 2/3] mfd: viperboard: switch to devm_ allocation

From: Octavian Purdila
Date: Thu Sep 25 2014 - 11:41:56 EST


Switch to using devm_ allocation to simplify the error path. Also
remove a redundant OOM error message.

Signed-off-by: Octavian Purdila <octavian.purdila@xxxxxxxxx>
---
drivers/mfd/viperboard.c | 23 +++++++----------------
1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/drivers/mfd/viperboard.c b/drivers/mfd/viperboard.c
index 5f62f4e..0d46d05 100644
--- a/drivers/mfd/viperboard.c
+++ b/drivers/mfd/viperboard.c
@@ -58,17 +58,14 @@ static int vprbrd_probe(struct usb_interface *interface,
int pipe, ret;

/* allocate memory for our device state and initialize it */
- vb = kzalloc(sizeof(*vb), GFP_KERNEL);
- if (vb == NULL) {
- dev_err(&interface->dev, "Out of memory\n");
+ vb = devm_kzalloc(&interface->dev, sizeof(*vb), GFP_KERNEL);
+ if (vb == NULL)
return -ENOMEM;
- }

- vb->buf = kzalloc(sizeof(struct vprbrd_i2c_write_msg), GFP_KERNEL);
- if (vb->buf == NULL) {
- ret = -ENOMEM;
- goto error;
- }
+ vb->buf = devm_kzalloc(&interface->dev,
+ sizeof(struct vprbrd_i2c_write_msg), GFP_KERNEL);
+ if (vb->buf == NULL)
+ return -ENOMEM;

mutex_init(&vb->lock);

@@ -109,11 +106,7 @@ static int vprbrd_probe(struct usb_interface *interface,
return 0;

error:
- if (vb) {
- usb_put_dev(vb->usb_dev);
- kfree(vb->buf);
- kfree(vb);
- }
+ usb_put_dev(vb->usb_dev);

return ret;
}
@@ -125,8 +118,6 @@ static void vprbrd_disconnect(struct usb_interface *interface)
mfd_remove_devices(&interface->dev);
usb_set_intfdata(interface, NULL);
usb_put_dev(vb->usb_dev);
- kfree(vb->buf);
- kfree(vb);

dev_dbg(&interface->dev, "disconnected\n");
}
--
1.9.1

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