[PATCH 1/3] Input: xpad - return proper error in error path

Axel Lin
2010-11-12T02:44:38Z

In current implementation, xpad_probe return 0 when
usb_alloc_urb failed for xpad->bulk_out and kzalloc failed for xpad->bdata.

This patch removes the initialization for error variable,
assign the error code at the place the error happens instead.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
drivers/input/joystick/xpad.c | 33 +++++++++++++++++++++++----------
1 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index f9fb7fa..39c0265 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -543,21 +543,25 @@ exit:
static int xpad_init_output(struct usb_interface *intf, struct usb_xpad *xpad)
{
struct usb_endpoint_descriptor *ep_irq_out;
- int error = -ENOMEM;
+ int error;

if (xpad->xtype != XTYPE_XBOX360 && xpad->xtype != XTYPE_XBOX)
return 0;

xpad->odata = usb_alloc_coherent(xpad->udev, XPAD_PKT_LEN,
GFP_KERNEL, &xpad->odata_dma);
- if (!xpad->odata)
+ if (!xpad->odata) {
+ error = -ENOMEM;
goto fail1;
+ }

mutex_init(&xpad->odata_mutex);

xpad->irq_out = usb_alloc_urb(0, GFP_KERNEL);
- if (!xpad->irq_out)
+ if (!xpad->irq_out) {
+ error = -ENOMEM;
goto fail2;
+ }

ep_irq_out = &intf->cur_altsetting->endpoint[1].desc;
usb_fill_int_urb(xpad->irq_out, xpad->udev,
@@ -789,8 +793,7 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
struct usb_xpad *xpad;
struct input_dev *input_dev;
struct usb_endpoint_descriptor *ep_irq_in;
- int i;
- int error = -ENOMEM;
+ int i, error;

for (i = 0; xpad_device[i].idVendor; i++) {
if ((le16_to_cpu(udev->descriptor.idVendor) == xpad_device[i].idVendor) &&
@@ -800,17 +803,23 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id

xpad = kzalloc(sizeof(struct usb_xpad), GFP_KERNEL);
input_dev = input_allocate_device();
- if (!xpad || !input_dev)
+ if (!xpad || !input_dev) {
+ error = -ENOMEM;
goto fail1;
+ }

xpad->idata = usb_alloc_coherent(udev, XPAD_PKT_LEN,
GFP_KERNEL, &xpad->idata_dma);
- if (!xpad->idata)
+ if (!xpad->idata) {
+ error = -ENOMEM;
goto fail1;
+ }

xpad->irq_in = usb_alloc_urb(0, GFP_KERNEL);
- if (!xpad->irq_in)
+ if (!xpad->irq_in) {
+ error = -ENOMEM;
goto fail2;
+ }

xpad->udev = udev;
xpad->mapping = xpad_device[i].mapping;
@@ -929,12 +938,16 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
* controller when it shows up
*/
xpad->bulk_out = usb_alloc_urb(0, GFP_KERNEL);
- if(!xpad->bulk_out)
+ if (!xpad->bulk_out) {
+ error = -ENOMEM;
goto fail5;
+ }

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

xpad->bdata[2] = 0x08;
switch (intf->cur_altsetting->desc.bInterfaceNumber) {
--
1.7.2