From: Julia Lawall <julia@diku.dk>
Date: Fri, 13 May 2011 15:48:41 +0000 (+0200)
Subject: drivers/staging/vt6656/main_usb.c: Delete unnecessary call to usb_kill_urb
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=17fb76165f307f7be2cfbc93958356fe50fa4791;p=linux-beck.git

drivers/staging/vt6656/main_usb.c: Delete unnecessary call to usb_kill_urb

Since in each case nothing has been done with the recently allocated urb,
it is not necessary to kill it before freeing it.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression urb;
statement S;
position p1,p2;
@@

urb = usb_alloc_urb@p1(...);
... when != urb
if (urb == NULL) S
... when != urb
usb_kill_urb@p2(urb);

@other exists@
position r.p1,r.p2;
@@

... when != usb_alloc_urb@p1(...)
usb_kill_urb@p2(...);

@depends on !other exists@
expression urb;
position r.p1,r.p2;
@@

urb = usb_alloc_urb@p1(...);
...
(
-usb_kill_urb@p2(urb);
+usb_free_urb(urb);
... when != urb
|
-usb_kill_urb@p2(urb);
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
index 9a8eaf135a0d..e18efd43e3e0 100644
--- a/drivers/staging/vt6656/main_usb.c
+++ b/drivers/staging/vt6656/main_usb.c
@@ -955,7 +955,6 @@ static BOOL device_alloc_bufs(PSDevice pDevice) {
 	pDevice->pInterruptURB = usb_alloc_urb(0, GFP_ATOMIC);
 	if (pDevice->pInterruptURB == NULL) {
 	    DBG_PRT(MSG_LEVEL_ERR,KERN_ERR"Failed to alloc int urb\n");
-   	    usb_kill_urb(pDevice->pControlURB);
 	    usb_free_urb(pDevice->pControlURB);
 	    goto free_rx_tx;
 	}
@@ -963,8 +962,6 @@ static BOOL device_alloc_bufs(PSDevice pDevice) {
     pDevice->intBuf.pDataBuf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
 	if (pDevice->intBuf.pDataBuf == NULL) {
 	    DBG_PRT(MSG_LEVEL_ERR,KERN_ERR"Failed to alloc int buf\n");
-   	    usb_kill_urb(pDevice->pControlURB);
-   	    usb_kill_urb(pDevice->pInterruptURB);
 	    usb_free_urb(pDevice->pControlURB);
 	    usb_free_urb(pDevice->pInterruptURB);
 	    goto free_rx_tx;