net: z85230: replace comparison to NULL with "!skb"

According to the chackpatch.pl, comparison to NULL could
be written "!skb".

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/wan/z85230.c b/drivers/net/wan/z85230.c
index 94ed9a24b52182eb0fc3ea67f142bd63d39d4eb3..0162239a8cb9c2be2005451265d6275d6a70da01 100644 (file)
--- a/drivers/net/wan/z85230.c
+++ b/drivers/net/wan/z85230.c
@@ -851,12 +851,12 @@ int z8530_sync_dma_open(struct net_device *dev, struct z8530_channel *c)
                return -EMSGSIZE;
         
        c->rx_buf[0]=(void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
-       if(c->rx_buf[0]==NULL)
+       if (!c->rx_buf[0])
                return -ENOBUFS;
        c->rx_buf[1]=c->rx_buf[0]+PAGE_SIZE/2;
        
        c->tx_dma_buf[0]=(void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
-       if(c->tx_dma_buf[0]==NULL)
+       if (!c->tx_dma_buf[0])
        {
                free_page((unsigned long)c->rx_buf[0]);
                c->rx_buf[0]=NULL;
@@ -1039,7 +1039,7 @@ int z8530_sync_txdma_open(struct net_device *dev, struct z8530_channel *c)
                return -EMSGSIZE;
         
        c->tx_dma_buf[0]=(void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
-       if(c->tx_dma_buf[0]==NULL)
+       if (!c->tx_dma_buf[0])
                return -ENOBUFS;
 
        c->tx_dma_buf[1] = c->tx_dma_buf[0] + PAGE_SIZE/2;
@@ -1397,7 +1397,7 @@ static void z8530_tx_begin(struct z8530_channel *c)
        c->tx_next_skb=NULL;
        c->tx_ptr=c->tx_next_ptr;
        
-       if(c->tx_skb==NULL)
+       if (!c->tx_skb)
        {
                /* Idle on */
                if(c->dma_tx)
@@ -1486,7 +1486,7 @@ static void z8530_tx_done(struct z8530_channel *c)
        struct sk_buff *skb;
 
        /* Actually this can happen.*/
-       if (c->tx_skb == NULL)
+       if (!c->tx_skb)
                return;
 
        skb = c->tx_skb;
@@ -1589,7 +1589,7 @@ static void z8530_rx_done(struct z8530_channel *c)
                 */
 
                skb = dev_alloc_skb(ct);
-               if (skb == NULL) {
+               if (!skb) {
                        c->netdevice->stats.rx_dropped++;
                        netdev_warn(c->netdevice, "Memory squeeze\n");
                } else {
@@ -1630,7 +1630,7 @@ static void z8530_rx_done(struct z8530_channel *c)
                RT_UNLOCK;
 
                c->skb2 = dev_alloc_skb(c->mtu);
-               if (c->skb2 == NULL)
+               if (!c->skb2)
                        netdev_warn(c->netdevice, "memory squeeze\n");
                else
                        skb_put(c->skb2, c->mtu);