[PATCH] USB: UHCI: Remove unused fields and unneeded tests for NULL

This patch (as562) removes from the uhci-hcd driver a few unused fields
and some unnecessary tests against NULL and assignments to NULL.  In fact
it wasn't until fairly recently that the tests became unnecessary.
Before last winter it was possible that the driver's stop() routine would
get called even if the start() routine returned an error, but now that
can't happen.  Hence there's no longer any need to check for partial
initialization.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/uhci-debug.c

@@ -348,7 +348,6 @@ static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp, char *bu
 
 	if (urbp->urb->status != -EINPROGRESS)
 		out += sprintf(out, "Status=%d ", urbp->urb->status);
-	//out += sprintf(out, "Inserttime=%lx ",urbp->inserttime);
 	//out += sprintf(out, "FSBRtime=%lx ",urbp->fsbrtime);
 
 	count = 0;

drivers/usb/host/uhci-hcd.c

@@ -437,36 +437,18 @@ static void release_uhci(struct uhci_hcd *uhci)
 	int i;
 
 	for (i = 0; i < UHCI_NUM_SKELQH; i++)
-		if (uhci->skelqh[i]) {
-			uhci_free_qh(uhci, uhci->skelqh[i]);
-			uhci->skelqh[i] = NULL;
-		}
+		uhci_free_qh(uhci, uhci->skelqh[i]);
 
-	if (uhci->term_td) {
-		uhci_free_td(uhci, uhci->term_td);
-		uhci->term_td = NULL;
-	}
+	uhci_free_td(uhci, uhci->term_td);
 
-	if (uhci->qh_pool) {
-		dma_pool_destroy(uhci->qh_pool);
-		uhci->qh_pool = NULL;
-	}
+	dma_pool_destroy(uhci->qh_pool);
 
-	if (uhci->td_pool) {
-		dma_pool_destroy(uhci->td_pool);
-		uhci->td_pool = NULL;
-	}
+	dma_pool_destroy(uhci->td_pool);
 
-	if (uhci->fl) {
-		dma_free_coherent(uhci_dev(uhci), sizeof(*uhci->fl),
-				uhci->fl, uhci->fl->dma_handle);
-		uhci->fl = NULL;
-	}
+	dma_free_coherent(uhci_dev(uhci), sizeof(*uhci->fl),
+			uhci->fl, uhci->fl->dma_handle);
 
-	if (uhci->dentry) {
-		debugfs_remove(uhci->dentry);
-		uhci->dentry = NULL;
-	}
+	debugfs_remove(uhci->dentry);
 }
 
 static int uhci_reset(struct usb_hcd *hcd)
@@ -690,31 +672,25 @@ static int uhci_start(struct usb_hcd *hcd)
  * error exits:
  */
 err_alloc_skelqh:
-	for (i = 0; i < UHCI_NUM_SKELQH; i++)
-		if (uhci->skelqh[i]) {
+	for (i = 0; i < UHCI_NUM_SKELQH; i++) {
+		if (uhci->skelqh[i])
 			uhci_free_qh(uhci, uhci->skelqh[i]);
-			uhci->skelqh[i] = NULL;
-		}
+	}
 
 	uhci_free_td(uhci, uhci->term_td);
-	uhci->term_td = NULL;
 
 err_alloc_term_td:
 	dma_pool_destroy(uhci->qh_pool);
-	uhci->qh_pool = NULL;
 
 err_create_qh_pool:
 	dma_pool_destroy(uhci->td_pool);
-	uhci->td_pool = NULL;
 
 err_create_td_pool:
 	dma_free_coherent(uhci_dev(uhci), sizeof(*uhci->fl),
 			uhci->fl, uhci->fl->dma_handle);
-	uhci->fl = NULL;
 
 err_alloc_fl:
 	debugfs_remove(uhci->dentry);
-	uhci->dentry = NULL;
 
 err_create_debug_entry:
 	return retval;

drivers/usb/host/uhci-hcd.h

@@ -205,8 +205,6 @@ struct uhci_td {
 	/* Software fields */
 	dma_addr_t dma_handle;
 
-	struct urb *urb;
-
 	struct list_head list;		/* P: urb->lock */
 	struct list_head remove_list;	/* P: uhci->td_remove_list_lock */
 
@@ -434,7 +432,6 @@ struct urb_priv {
 						/*  a control transfer, retrigger */
 						/*  the status phase */
 
-	unsigned long inserttime;	/* In jiffies */
 	unsigned long fsbrtime;		/* In jiffies */
 
 	struct list_head queue_list;	/* P: uhci->frame_list_lock */

drivers/usb/host/uhci-q.c

@@ -443,7 +443,6 @@ static struct urb_priv *uhci_alloc_urb_priv(struct uhci_hcd *uhci, struct urb *u
 
 	memset((void *)urbp, 0, sizeof(*urbp));
 
-	urbp->inserttime = jiffies;
 	urbp->fsbrtime = jiffies;
 	urbp->urb = urb;
 
@@ -462,8 +461,6 @@ static void uhci_add_td_to_urb(struct urb *urb, struct uhci_td *td)
 {
 	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
 
-	td->urb = urb;
-
 	list_add_tail(&td->list, &urbp->td_list);
 }
 
@@ -473,8 +470,6 @@ static void uhci_remove_td_from_urb(struct uhci_td *td)
 		return;
 
 	list_del_init(&td->list);
-
-	td->urb = NULL;
 }
 
 static void uhci_destroy_urb_priv(struct uhci_hcd *uhci, struct urb *urb)