diff --git a/drivers/net/acenic.c b/drivers/net/acenic.c
index dbecc6b..b8953de 100644
--- a/drivers/net/acenic.c
+++ b/drivers/net/acenic.c
@@ -871,10 +871,8 @@
 	if (ap->info)
 		pci_free_consistent(ap->pdev, sizeof(struct ace_info),
 				    ap->info, ap->info_dma);
-	if (ap->skb)
-		kfree(ap->skb);
-	if (ap->trace_buf)
-		kfree(ap->trace_buf);
+	kfree(ap->skb);
+	kfree(ap->trace_buf);
 
 	if (dev->irq)
 		free_irq(dev->irq, dev);
diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index 7850691..332e995 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -1606,8 +1606,7 @@
 	/* here we should have a valid dev plus aup-> register addresses
 	 * so we can reset the mac properly.*/
 	reset_mac(dev);
-	if (aup->mii)
-		kfree(aup->mii);
+	kfree(aup->mii);
 	for (i = 0; i < NUM_RX_DMA; i++) {
 		if (aup->rx_db_inuse[i])
 			ReleaseDB(aup, aup->rx_db_inuse[i]);
@@ -1806,8 +1805,7 @@
 		if (dev) {
 			aup = (struct au1000_private *) dev->priv;
 			unregister_netdev(dev);
-			if (aup->mii)
-				kfree(aup->mii);
+			kfree(aup->mii);
 			for (j = 0; j < NUM_RX_DMA; j++) {
 				if (aup->rx_db_inuse[j])
 					ReleaseDB(aup, aup->rx_db_inuse[j]);
diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index ab84507..5485e3b 100644
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -1131,14 +1131,10 @@
  */
 static void b44_free_consistent(struct b44 *bp)
 {
-	if (bp->rx_buffers) {
-		kfree(bp->rx_buffers);
-		bp->rx_buffers = NULL;
-	}
-	if (bp->tx_buffers) {
-		kfree(bp->tx_buffers);
-		bp->tx_buffers = NULL;
-	}
+	kfree(bp->rx_buffers);
+	bp->rx_buffers = NULL;
+	kfree(bp->tx_buffers);
+	bp->tx_buffers = NULL;
 	if (bp->rx_ring) {
 		if (bp->flags & B44_FLAG_RX_RING_HACK) {
 			dma_unmap_single(&bp->pdev->dev, bp->rx_ring_dma,
diff --git a/drivers/net/bmac.c b/drivers/net/bmac.c
index 60dba4a..73f2fcf 100644
--- a/drivers/net/bmac.c
+++ b/drivers/net/bmac.c
@@ -1689,10 +1689,8 @@
 {
 	macio_unregister_driver(&bmac_driver);
 
-	if (bmac_emergency_rxbuf != NULL) {
-		kfree(bmac_emergency_rxbuf);
-		bmac_emergency_rxbuf = NULL;
-	}
+	kfree(bmac_emergency_rxbuf);
+	bmac_emergency_rxbuf = NULL;
 }
 
 MODULE_AUTHOR("Randy Gobbel/Paul Mackerras");
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 3a2ace0..11d2523 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -314,20 +314,16 @@
 				    bp->tx_desc_ring, bp->tx_desc_mapping);
 		bp->tx_desc_ring = NULL;
 	}
-	if (bp->tx_buf_ring) {
-		kfree(bp->tx_buf_ring);
-		bp->tx_buf_ring = NULL;
-	}
+	kfree(bp->tx_buf_ring);
+	bp->tx_buf_ring = NULL;
 	if (bp->rx_desc_ring) {
 		pci_free_consistent(bp->pdev,
 				    sizeof(struct rx_bd) * RX_DESC_CNT,
 				    bp->rx_desc_ring, bp->rx_desc_mapping);
 		bp->rx_desc_ring = NULL;
 	}
-	if (bp->rx_buf_ring) {
-		kfree(bp->rx_buf_ring);
-		bp->rx_buf_ring = NULL;
-	}
+	kfree(bp->rx_buf_ring);
+	bp->rx_buf_ring = NULL;
 }
 
 static int
diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index 6b9acc7..9c7feae 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -965,11 +965,8 @@
 	if(rxdr->desc)
 		pci_free_consistent(pdev, rxdr->size, rxdr->desc, rxdr->dma);
 
-	if(txdr->buffer_info)
-		kfree(txdr->buffer_info);
-	if(rxdr->buffer_info)
-		kfree(rxdr->buffer_info);
-
+	kfree(txdr->buffer_info);
+	kfree(rxdr->buffer_info);
 	return;
 }
 
diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index 85d6dc0..3e9accf 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -390,10 +390,8 @@
 		       "MTU change cancelled.\n",
 		       ax->dev->name);
 		dev->mtu = ax->mtu;
-		if (xbuff != NULL)
-			kfree(xbuff);
-		if (rbuff != NULL)
-			kfree(rbuff);
+		kfree(xbuff);
+		kfree(rbuff);
 		return;
 	}
 
diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c
index f5819527..36da54a 100644
--- a/drivers/net/ibmveth.c
+++ b/drivers/net/ibmveth.c
@@ -276,10 +276,8 @@
 {
 	int i;
 
-	if(pool->free_map) {
-		kfree(pool->free_map);
-		pool->free_map  = NULL;
-	}
+	kfree(pool->free_map);
+	pool->free_map = NULL;
 
 	if(pool->skbuff && pool->dma_addr) {
 		for(i = 0; i < pool->size; ++i) {
diff --git a/drivers/net/irda/donauboe.c b/drivers/net/irda/donauboe.c
index 0a08c53..0282771 100644
--- a/drivers/net/irda/donauboe.c
+++ b/drivers/net/irda/donauboe.c
@@ -1695,11 +1695,9 @@
 
 freebufs:
   for (i = 0; i < TX_SLOTS; ++i)
-    if (self->tx_bufs[i])
-      kfree (self->tx_bufs[i]);
+    kfree (self->tx_bufs[i]);
   for (i = 0; i < RX_SLOTS; ++i)
-    if (self->rx_bufs[i])
-      kfree (self->rx_bufs[i]);
+    kfree (self->rx_bufs[i]);
   kfree(self->ringbuf);
 
 freeregion:
diff --git a/drivers/net/irda/irda-usb.c b/drivers/net/irda/irda-usb.c
index 6c766fd..c22c051 100644
--- a/drivers/net/irda/irda-usb.c
+++ b/drivers/net/irda/irda-usb.c
@@ -1168,10 +1168,8 @@
 	unregister_netdev(self->netdev);
 
 	/* Remove the speed buffer */
-	if (self->speed_buff != NULL) {
-		kfree(self->speed_buff);
-		self->speed_buff = NULL;
-	}
+	kfree(self->speed_buff);
+	self->speed_buff = NULL;
 }
 
 /********************** USB CONFIG SUBROUTINES **********************/
diff --git a/drivers/net/irda/irport.c b/drivers/net/irda/irport.c
index 5971315..3d016a4 100644
--- a/drivers/net/irda/irport.c
+++ b/drivers/net/irda/irport.c
@@ -235,8 +235,7 @@
 		   __FUNCTION__, self->io.sir_base);
 	release_region(self->io.sir_base, self->io.sir_ext);
 
-	if (self->tx_buff.head)
-		kfree(self->tx_buff.head);
+	kfree(self->tx_buff.head);
 	
 	if (self->rx_buff.skb)
 		kfree_skb(self->rx_buff.skb);
diff --git a/drivers/net/irda/sir_dev.c b/drivers/net/irda/sir_dev.c
index efc5a88..df22b8b 100644
--- a/drivers/net/irda/sir_dev.c
+++ b/drivers/net/irda/sir_dev.c
@@ -490,8 +490,7 @@
 {
 	if (dev->rx_buff.skb)
 		kfree_skb(dev->rx_buff.skb);
-	if (dev->tx_buff.head)
-		kfree(dev->tx_buff.head);
+	kfree(dev->tx_buff.head);
 	dev->rx_buff.head = dev->tx_buff.head = NULL;
 	dev->rx_buff.skb = NULL;
 }
diff --git a/drivers/net/irda/vlsi_ir.c b/drivers/net/irda/vlsi_ir.c
index 651c5a6..a9f49f0 100644
--- a/drivers/net/irda/vlsi_ir.c
+++ b/drivers/net/irda/vlsi_ir.c
@@ -473,8 +473,7 @@
 		rd_set_addr_status(rd, 0, 0);
 		if (busaddr)
 			pci_unmap_single(r->pdev, busaddr, r->len, r->dir);
-		if (rd->buf)
-			kfree(rd->buf);
+		kfree(rd->buf);
 	}
 	kfree(r);
 	return 0;
diff --git a/drivers/net/mace.c b/drivers/net/mace.c
index 81d0a26..09b1e7b 100644
--- a/drivers/net/mace.c
+++ b/drivers/net/mace.c
@@ -1035,10 +1035,8 @@
 {
 	macio_unregister_driver(&mace_driver);
 
-	if (dummy_buf) {
-		kfree(dummy_buf);
-		dummy_buf = NULL;
-	}
+	kfree(dummy_buf);
+	dummy_buf = NULL;
 }
 
 MODULE_AUTHOR("Paul Mackerras");
diff --git a/drivers/net/ni65.c b/drivers/net/ni65.c
index 925d1df..bb42ff2 100644
--- a/drivers/net/ni65.c
+++ b/drivers/net/ni65.c
@@ -696,8 +696,7 @@
 		return;
 
 	for(i=0;i<TMDNUM;i++) {
-		if(p->tmdbounce[i])
-			kfree(p->tmdbounce[i]);
+		kfree(p->tmdbounce[i]);
 #ifdef XMT_VIA_SKB
 		if(p->tmd_skb[i])
 			dev_kfree_skb(p->tmd_skb[i]);
@@ -710,12 +709,10 @@
 		if(p->recv_skb[i])
 			dev_kfree_skb(p->recv_skb[i]);
 #else
-		if(p->recvbounce[i])
-			kfree(p->recvbounce[i]);
+		kfree(p->recvbounce[i]);
 #endif
 	}
-	if(p->self)
-		kfree(p->self);
+	kfree(p->self);
 }
 
 
diff --git a/drivers/net/rrunner.c b/drivers/net/rrunner.c
index ec1a18d1..19c2df9 100644
--- a/drivers/net/rrunner.c
+++ b/drivers/net/rrunner.c
@@ -1710,10 +1710,8 @@
 			error = -EFAULT;
 		}
 	wf_out:
-		if (oldimage)
-			kfree(oldimage);
-		if (image)
-			kfree(image);
+		kfree(oldimage);
+		kfree(image);
 		return error;
 		
 	case SIOCRRID:
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index d303d16..5ea8977 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -705,8 +705,7 @@
 			}
 			kfree(mac_control->rings[i].ba[j]);
 		}
-		if (mac_control->rings[i].ba)
-			kfree(mac_control->rings[i].ba);
+		kfree(mac_control->rings[i].ba);
 	}
 #endif
 
diff --git a/drivers/net/saa9730.c b/drivers/net/saa9730.c
index fd01670..110e777 100644
--- a/drivers/net/saa9730.c
+++ b/drivers/net/saa9730.c
@@ -997,10 +997,7 @@
 
         if (dev) {
                 unregister_netdev(dev);
-
-		if (dev->priv)
-			kfree(dev->priv);
-
+		kfree(dev->priv);
                 free_netdev(dev);
                 pci_release_regions(pdev);
                 pci_disable_device(pdev);
@@ -1096,8 +1093,7 @@
 	return 0;
 
  out:
-	if (dev->priv)
-		kfree(dev->priv);
+	kfree(dev->priv);
 	return ret;
 }
 
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 551c944..b547233 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -3918,10 +3918,8 @@
  */
 static void tg3_free_consistent(struct tg3 *tp)
 {
-	if (tp->rx_std_buffers) {
-		kfree(tp->rx_std_buffers);
-		tp->rx_std_buffers = NULL;
-	}
+	kfree(tp->rx_std_buffers);
+	tp->rx_std_buffers = NULL;
 	if (tp->rx_std) {
 		pci_free_consistent(tp->pdev, TG3_RX_RING_BYTES,
 				    tp->rx_std, tp->rx_std_mapping);
diff --git a/drivers/net/tulip/de2104x.c b/drivers/net/tulip/de2104x.c
index 6b8eee8..d7fb3ff 100644
--- a/drivers/net/tulip/de2104x.c
+++ b/drivers/net/tulip/de2104x.c
@@ -2076,8 +2076,7 @@
 	return 0;
 
 err_out_iomap:
-	if (de->ee_data)
-		kfree(de->ee_data);
+	kfree(de->ee_data);
 	iounmap(regs);
 err_out_res:
 	pci_release_regions(pdev);
@@ -2096,8 +2095,7 @@
 	if (!dev)
 		BUG();
 	unregister_netdev(dev);
-	if (de->ee_data)
-		kfree(de->ee_data);
+	kfree(de->ee_data);
 	iounmap(de->regs);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
diff --git a/drivers/net/tulip/tulip_core.c b/drivers/net/tulip/tulip_core.c
index 6266a9a..125ed00 100644
--- a/drivers/net/tulip/tulip_core.c
+++ b/drivers/net/tulip/tulip_core.c
@@ -1727,8 +1727,7 @@
 			     tp->rx_ring, tp->rx_ring_dma);
 
 err_out_mtable:
-	if (tp->mtable)
-		kfree (tp->mtable);
+	kfree (tp->mtable);
 	pci_iounmap(pdev, ioaddr);
 
 err_out_free_res:
@@ -1806,8 +1805,7 @@
 			     sizeof (struct tulip_rx_desc) * RX_RING_SIZE +
 			     sizeof (struct tulip_tx_desc) * TX_RING_SIZE,
 			     tp->rx_ring, tp->rx_ring_dma);
-	if (tp->mtable)
-		kfree (tp->mtable);
+	kfree (tp->mtable);
 	pci_iounmap(pdev, tp->base_addr);
 	free_netdev (dev);
 	pci_release_regions (pdev);
diff --git a/drivers/net/via-velocity.c b/drivers/net/via-velocity.c
index abc5cee..a368d08 100644
--- a/drivers/net/via-velocity.c
+++ b/drivers/net/via-velocity.c
@@ -1212,10 +1212,8 @@
 			velocity_free_td_ring_entry(vptr, j, i);
 
 		}
-		if (vptr->td_infos[j]) {
-			kfree(vptr->td_infos[j]);
-			vptr->td_infos[j] = NULL;
-		}
+		kfree(vptr->td_infos[j]);
+		vptr->td_infos[j] = NULL;
 	}
 }
 
diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index cb429e7..4c11699 100644
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -2381,14 +2381,10 @@
 			dev_kfree_skb(skb);
 	}
 
-	if (ai->flash)
-		kfree(ai->flash);
-	if (ai->rssi)
-		kfree(ai->rssi);
-	if (ai->APList)
-		kfree(ai->APList);
-	if (ai->SSID)
-		kfree(ai->SSID);
+	kfree(ai->flash);
+	kfree(ai->rssi);
+	kfree(ai->APList);
+	kfree(ai->SSID);
 	if (freeres) {
 		/* PCMCIA frees this stuff, so only for PCI and ISA */
 	        release_region( dev->base_addr, 64 );
@@ -3626,10 +3622,8 @@
 	int rc;
 
 	memset( &mySsid, 0, sizeof( mySsid ) );
-	if (ai->flash) {
-		kfree (ai->flash);
-		ai->flash = NULL;
-	}
+	kfree (ai->flash);
+	ai->flash = NULL;
 
 	/* The NOP is the first step in getting the card going */
 	cmd.cmd = NOP;
@@ -3666,14 +3660,10 @@
 		tdsRssiRid rssi_rid;
 		CapabilityRid cap_rid;
 
-		if (ai->APList) {
-			kfree(ai->APList);
-			ai->APList = NULL;
-		}
-		if (ai->SSID) {
-			kfree(ai->SSID);
-			ai->SSID = NULL;
-		}
+		kfree(ai->APList);
+		ai->APList = NULL;
+		kfree(ai->SSID);
+		ai->SSID = NULL;
 		// general configuration (read/modify/write)
 		status = readConfigRid(ai, lock);
 		if ( status != SUCCESS ) return ERROR;
@@ -3687,10 +3677,8 @@
 				memcpy(ai->rssi, (u8*)&rssi_rid + 2, 512); /* Skip RID length member */
 		}
 		else {
-			if (ai->rssi) {
-				kfree(ai->rssi);
-				ai->rssi = NULL;
-			}
+			kfree(ai->rssi);
+			ai->rssi = NULL;
 			if (cap_rid.softCap & 8)
 				ai->config.rmode |= RXMODE_NORMALIZED_RSSI;
 			else
@@ -5369,11 +5357,13 @@
 
 static int proc_close( struct inode *inode, struct file *file )
 {
-	struct proc_data *data = (struct proc_data *)file->private_data;
-	if ( data->on_close != NULL ) data->on_close( inode, file );
-	if ( data->rbuffer ) kfree( data->rbuffer );
-	if ( data->wbuffer ) kfree( data->wbuffer );
-	kfree( data );
+	struct proc_data *data = file->private_data;
+
+	if (data->on_close != NULL)
+		data->on_close(inode, file);
+	kfree(data->rbuffer);
+	kfree(data->wbuffer);
+	kfree(data);
 	return 0;
 }
 
diff --git a/drivers/net/wireless/airo_cs.c b/drivers/net/wireless/airo_cs.c
index bf25584..784de91 100644
--- a/drivers/net/wireless/airo_cs.c
+++ b/drivers/net/wireless/airo_cs.c
@@ -258,9 +258,7 @@
 	
 	/* Unlink device structure, free pieces */
 	*linkp = link->next;
-	if (link->priv) {
-		kfree(link->priv);
-	}
+	kfree(link->priv);
 	kfree(link);
 	
 } /* airo_detach */
diff --git a/drivers/net/wireless/atmel.c b/drivers/net/wireless/atmel.c
index d570110..1fbe027 100644
--- a/drivers/net/wireless/atmel.c
+++ b/drivers/net/wireless/atmel.c
@@ -1653,8 +1653,7 @@
 	unregister_netdev(dev);
 	remove_proc_entry("driver/atmel", NULL);
 	free_irq(dev->irq, dev);
-	if (priv->firmware)
-		kfree(priv->firmware);
+	kfree(priv->firmware);
 	if (freeres) {
 		/* PCMCIA frees this stuff, so only for PCI */
 	        release_region(dev->base_addr, 64);
@@ -2450,8 +2449,7 @@
 			break;
 		}
 
-		if (priv->firmware)
-			kfree(priv->firmware);
+		kfree(priv->firmware);
 		
 		priv->firmware = new_firmware;
 		priv->firmware_length = com.len;
diff --git a/drivers/net/wireless/atmel_cs.c b/drivers/net/wireless/atmel_cs.c
index ff031a3..195cb36 100644
--- a/drivers/net/wireless/atmel_cs.c
+++ b/drivers/net/wireless/atmel_cs.c
@@ -259,8 +259,7 @@
 
 	/* Unlink device structure, free pieces */
 	*linkp = link->next;
-	if (link->priv)
-		kfree(link->priv);
+	kfree(link->priv);
 	kfree(link);
 }
 
diff --git a/drivers/net/wireless/hostap/hostap_ioctl.c b/drivers/net/wireless/hostap/hostap_ioctl.c
index 53f5246..2617d70 100644
--- a/drivers/net/wireless/hostap/hostap_ioctl.c
+++ b/drivers/net/wireless/hostap/hostap_ioctl.c
@@ -552,7 +552,6 @@
 
 	kfree(addr);
 	kfree(qual);
-
 	return 0;
 }
 
@@ -3081,9 +3080,7 @@
 	ret = local->func->download(local, param);
 
  out:
-	if (param != NULL)
-		kfree(param);
-
+	kfree(param);
 	return ret;
 }
 #endif /* PRISM2_DOWNLOAD_SUPPORT */
@@ -3890,9 +3887,7 @@
 	}
 
  out:
-	if (param != NULL)
-		kfree(param);
-
+	kfree(param);
 	return ret;
 }
 
diff --git a/drivers/net/wireless/prism54/islpci_dev.c b/drivers/net/wireless/prism54/islpci_dev.c
index 6c9584a..78bdb35 100644
--- a/drivers/net/wireless/prism54/islpci_dev.c
+++ b/drivers/net/wireless/prism54/islpci_dev.c
@@ -754,8 +754,7 @@
 			pci_unmap_single(priv->pdev, buf->pci_addr,
 					 buf->size, PCI_DMA_FROMDEVICE);
 		buf->pci_addr = 0;
-		if (buf->mem)
-			kfree(buf->mem);
+		kfree(buf->mem);
 		buf->size = 0;
 		buf->mem = NULL;
         }
diff --git a/drivers/net/wireless/prism54/oid_mgt.c b/drivers/net/wireless/prism54/oid_mgt.c
index 12123e2..eea2f04 100644
--- a/drivers/net/wireless/prism54/oid_mgt.c
+++ b/drivers/net/wireless/prism54/oid_mgt.c
@@ -268,11 +268,10 @@
 
 	if (!priv->mib)
 		return;
-	for (i = 0; i < OID_NUM_LAST; i++)
-		if (priv->mib[i]) {
-			kfree(priv->mib[i]);
-			priv->mib[i] = NULL;
-		}
+	for (i = 0; i < OID_NUM_LAST; i++) {
+		kfree(priv->mib[i]);
+		priv->mib[i] = NULL;
+	}
 	kfree(priv->mib);
 	priv->mib = NULL;
 }
diff --git a/drivers/net/wireless/strip.c b/drivers/net/wireless/strip.c
index 7bc7fc8..d25264b 100644
--- a/drivers/net/wireless/strip.c
+++ b/drivers/net/wireless/strip.c
@@ -860,12 +860,9 @@
 		strip_info->mtu = dev->mtu = mtu;
 		return (1);
 	}
-	if (r)
-		kfree(r);
-	if (s)
-		kfree(s);
-	if (t)
-		kfree(t);
+	kfree(r);
+	kfree(s);
+	kfree(t);
 	return (0);
 }
 
@@ -922,13 +919,9 @@
 	printk(KERN_NOTICE "%s: strip MTU changed fom %d to %d.\n",
 	       strip_info->dev->name, old_mtu, strip_info->mtu);
 
-	if (orbuff)
-		kfree(orbuff);
-	if (osbuff)
-		kfree(osbuff);
-	if (otbuff)
-		kfree(otbuff);
-
+	kfree(orbuff);
+	kfree(osbuff);
+	kfree(otbuff);
 	return 0;
 }
 
@@ -2498,18 +2491,13 @@
 	/*
 	 * Free all STRIP frame buffers.
 	 */
-	if (strip_info->rx_buff) {
-		kfree(strip_info->rx_buff);
-		strip_info->rx_buff = NULL;
-	}
-	if (strip_info->sx_buff) {
-		kfree(strip_info->sx_buff);
-		strip_info->sx_buff = NULL;
-	}
-	if (strip_info->tx_buff) {
-		kfree(strip_info->tx_buff);
-		strip_info->tx_buff = NULL;
-	}
+	kfree(strip_info->rx_buff);
+	strip_info->rx_buff = NULL;
+	kfree(strip_info->sx_buff);
+	strip_info->sx_buff = NULL;
+	kfree(strip_info->tx_buff);
+	strip_info->tx_buff = NULL;
+
 	del_timer(&strip_info->idle_timer);
 	return 0;
 }