[PATCH 3/3] Input: xpad - fix resource reclaim in xpad_probe error path

Axel Lin
2010-11-12T02:47:19Z

Properly free the resources in error path by the reverse order of resource
allocation.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
drivers/input/joystick/xpad.c | 27 ++++++++++++++++-----------
1 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 26b2f2b..f581301 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -896,15 +896,15 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id

error = xpad_init_output(intf, xpad);
if (error)
- goto fail2;
+ goto fail3;

error = xpad_init_ff(xpad);
if (error)
- goto fail3;
+ goto fail4;

error = xpad_led_probe(xpad);
if (error)
- goto fail3;
+ goto fail5;

ep_irq_in = &intf->cur_altsetting->endpoint[0].desc;
usb_fill_int_urb(xpad->irq_in, udev,
@@ -916,7 +916,7 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id

error = input_register_device(xpad->dev);
if (error)
- goto fail4;
+ goto fail6;

usb_set_intfdata(intf, xpad);

@@ -931,7 +931,7 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
xpad->irq_in->dev = xpad->udev;
error = usb_submit_urb(xpad->irq_in, GFP_KERNEL);
if (error)
- goto fail4;
+ goto fail7;

/*
* Setup the message to set the LEDs on the
@@ -940,13 +940,13 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
xpad->bulk_out = usb_alloc_urb(0, GFP_KERNEL);
if (!xpad->bulk_out) {
error = -ENOMEM;
- goto fail5;
+ goto fail8;
}

xpad->bdata = kzalloc(XPAD_PKT_LEN, GFP_KERNEL);
if (!xpad->bdata) {
error = -ENOMEM;
- goto fail6;
+ goto fail9;
}

xpad->bdata[2] = 0x08;
@@ -972,10 +972,15 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id

return 0;

- fail6: usb_free_urb(xpad->bulk_out);
- fail5: usb_kill_urb(xpad->irq_in);
- fail4: usb_free_urb(xpad->irq_in);
- fail3: xpad_deinit_output(xpad);
+ fail9: usb_free_urb(xpad->bulk_out);
+ fail8: usb_kill_urb(xpad->irq_in);
+ fail7: input_unregister_device(input_dev);
+ input_dev = NULL;
+ fail6: xpad_led_disconnect(xpad);
+ fail5: if (input_dev)
+ input_ff_destroy(input_dev);
+ fail4: xpad_deinit_output(xpad);
+ fail3: usb_free_urb(xpad->irq_in);
fail2: usb_free_coherent(udev, XPAD_PKT_LEN, xpad->idata, xpad->idata_dma);
fail1: input_free_device(input_dev);
kfree(xpad);
--
1.7.2