[patch] USB: wusbcore/wa-xfer: error handling fixes in setup_segs()

Dan Carpenter
2013-02-01T12:53:34Z

1) It didn't free xfer->seg[0] so there was a leak.
2) xfer->seg[cnt] can be NULL.
3) Use usb_free_urb() for ->dto_urb instead of kfree().

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c
index 57c01ab..6ef94bc 100644
--- a/drivers/usb/wusbcore/wa-xfer.c
+++ b/drivers/usb/wusbcore/wa-xfer.c
@@ -695,9 +695,9 @@ error_dto_alloc:
cnt--;
error_seg_kzalloc:
/* use the fact that cnt is left at were it failed */
- for (; cnt > 0; cnt--) {
- if (xfer->is_inbound = 0)
- kfree(xfer->seg[cnt]->dto_urb);
+ for (; cnt >= 0; cnt--) {
+ if (xfer->seg[cnt] && xfer->is_inbound = 0)
+ usb_free_urb(xfer->seg[cnt]->dto_urb);
kfree(xfer->seg[cnt]);
}