staging: wlan-ng: simplify NULL tests

Replace direct comparisons to NULL i.e. 'x == NULL' with '!x' for
consistency. Coccinelle semantic patch used:

@@
identifier func;
expression x;
statement Z;
@@

x = func(...);

if (
(
+	!
	x
-	== NULL
|
+	!
-	NULL ==
	x
)
   ) Z
Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/hfa384x_usb.c

@@ -328,7 +328,7 @@ static int submit_rx_urb(hfa384x_t *hw, gfp_t memflags)
 	int result;
 
 	skb = dev_alloc_skb(sizeof(hfa384x_usbin_t));
-	if (skb == NULL) {
+	if (!skb) {
 		result = -ENOMEM;
 		goto done;
 	}
@@ -1298,7 +1298,7 @@ hfa384x_docmd(hfa384x_t *hw,
 	hfa384x_usbctlx_t *ctlx;
 
 	ctlx = usbctlx_alloc();
-	if (ctlx == NULL) {
+	if (!ctlx) {
 		result = -ENOMEM;
 		goto done;
 	}
@@ -1388,7 +1388,7 @@ hfa384x_dorrid(hfa384x_t *hw,
 	hfa384x_usbctlx_t *ctlx;
 
 	ctlx = usbctlx_alloc();
-	if (ctlx == NULL) {
+	if (!ctlx) {
 		result = -ENOMEM;
 		goto done;
 	}
@@ -1469,7 +1469,7 @@ hfa384x_dowrid(hfa384x_t *hw,
 	hfa384x_usbctlx_t *ctlx;
 
 	ctlx = usbctlx_alloc();
-	if (ctlx == NULL) {
+	if (!ctlx) {
 		result = -ENOMEM;
 		goto done;
 	}
@@ -1557,7 +1557,7 @@ hfa384x_dormem(hfa384x_t *hw,
 	hfa384x_usbctlx_t *ctlx;
 
 	ctlx = usbctlx_alloc();
-	if (ctlx == NULL) {
+	if (!ctlx) {
 		result = -ENOMEM;
 		goto done;
 	}
@@ -1650,7 +1650,7 @@ hfa384x_dowmem(hfa384x_t *hw,
 	pr_debug("page=0x%04x offset=0x%04x len=%d\n", page, offset, len);
 
 	ctlx = usbctlx_alloc();
-	if (ctlx == NULL) {
+	if (!ctlx) {
 		result = -ENOMEM;
 		goto done;
 	}
@@ -3446,7 +3446,7 @@ static void hfa384x_int_rxmonitor(wlandevice_t *wlandev,
 	}
 
 	skb = dev_alloc_skb(skblen);
-	if (skb == NULL)
+	if (!skb)
 		return;
 
 	/* only prepend the prism header if in the right mode */

drivers/staging/wlan-ng/prism2fw.c

@@ -538,7 +538,7 @@ static int mkimage(struct imgchunk *clist, unsigned int *ccnt)
 	/* Allocate buffer space for chunks */
 	for (i = 0; i < *ccnt; i++) {
 		clist[i].data = kzalloc(clist[i].len, GFP_KERNEL);
-		if (clist[i].data == NULL) {
+		if (!clist[i].data) {
 			pr_err("failed to allocate image space, exitting.\n");
 			return 1;
 		}

drivers/staging/wlan-ng/prism2usb.c

@@ -67,7 +67,7 @@ static int prism2sta_probe_usb(struct usb_interface *interface,
 
 	dev = interface_to_usbdev(interface);
 	wlandev = create_wlan();
-	if (wlandev == NULL) {
+	if (!wlandev) {
 		dev_err(&interface->dev, "Memory allocation failure.\n");
 		result = -EIO;
 		goto failed;