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Date: Wed, 11 May 2011 21:59:31 -0700
From: Joe Perches <joe@...ches.com>
To: Grant Grundler <grundler@...isc-linux.org>
Cc: Tobias Ringstrom <tori@...appy.mine.nu>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/4] tulip: Convert printks to netdev_<level>
On Wed, 2011-05-11 at 22:09 -0600, Grant Grundler wrote:
> Some additional clean ups to consider in a future patch:
> o replace "if (skb == NULL)" with "if (!skb)"
Hey Grant.
I generally don't change those.
While I prefer (!ptr), others prefer explicit comparisons.
I do have a script that does the conversion though.
(de4x5.c is a mess and I didn't change it)
Here's the output with hoisted assigns from if too.
(and a spelling fix I noticed)
drivers/net/tulip/de2104x.c | 3 ++-
drivers/net/tulip/dmfe.c | 11 ++++++-----
drivers/net/tulip/eeprom.c | 6 +++---
drivers/net/tulip/interrupt.c | 18 +++++++++---------
drivers/net/tulip/timer.c | 2 +-
drivers/net/tulip/tulip_core.c | 15 +++++++++------
drivers/net/tulip/uli526x.c | 15 +++++++--------
drivers/net/tulip/winbond-840.c | 14 ++++++++------
drivers/net/tulip/xircom_cb.c | 12 ++++++------
9 files changed, 51 insertions(+), 45 deletions(-)
diff --git a/drivers/net/tulip/de2104x.c b/drivers/net/tulip/de2104x.c
index e2f6923..45a4843 100644
--- a/drivers/net/tulip/de2104x.c
+++ b/drivers/net/tulip/de2104x.c
@@ -2170,7 +2170,8 @@ static int de_resume (struct pci_dev *pdev)
goto out;
if (!netif_running(dev))
goto out_attach;
- if ((retval = pci_enable_device(pdev))) {
+ retval = pci_enable_device(pdev);
+ if (retval) {
netdev_err(dev, "pci_enable_device failed in resume\n");
goto out;
}
diff --git a/drivers/net/tulip/dmfe.c b/drivers/net/tulip/dmfe.c
index 4685127..588d6b4 100644
--- a/drivers/net/tulip/dmfe.c
+++ b/drivers/net/tulip/dmfe.c
@@ -400,7 +400,7 @@ static int __devinit dmfe_init_one (struct pci_dev *pdev,
/* Init network device */
dev = alloc_etherdev(sizeof(*db));
- if (dev == NULL)
+ if (!dev)
return -ENOMEM;
SET_NETDEV_DEV(dev, &pdev->dev);
@@ -1009,10 +1009,10 @@ static void dmfe_rx_packet(struct DEVICE *dev, struct dmfe_board_info * db)
db->dm910x_chk_mode = 3;
} else {
/* Good packet, send to upper layer */
- /* Shorst packet used new SKB */
+ /* Short packet used new SKB */
if ((rxlen < RX_COPY_SIZE) &&
- ((newskb = dev_alloc_skb(rxlen + 2))
- != NULL)) {
+ (newskb =
+ dev_alloc_skb(rxlen + 2))) {
skb = newskb;
/* size less than COPY_SIZE, allocate a rxlen SKB */
@@ -1561,7 +1561,8 @@ static void allocate_rx_buffer(struct dmfe_board_info *db)
rxptr = db->rx_insert_ptr;
while(db->rx_avail_cnt < RX_DESC_CNT) {
- if ( ( skb = dev_alloc_skb(RX_ALLOC_SIZE) ) == NULL )
+ skb = dev_alloc_skb(RX_ALLOC_SIZE);
+ if (!skb)
break;
rxptr->rx_skb_ptr = skb; /* FIXME (?) */
rxptr->rdes2 = cpu_to_le32( pci_map_single(db->pdev, skb->data,
diff --git a/drivers/net/tulip/eeprom.c b/drivers/net/tulip/eeprom.c
index fa5eee9..a11eb73 100644
--- a/drivers/net/tulip/eeprom.c
+++ b/drivers/net/tulip/eeprom.c
@@ -123,7 +123,7 @@ static void __devinit tulip_build_fake_mediatable(struct tulip_private *tp)
tp->mtable = kmalloc(sizeof(struct mediatable) +
sizeof(struct medialeaf), GFP_KERNEL);
- if (tp->mtable == NULL)
+ if (!tp->mtable)
return; /* Horrible, impossible failure. */
tp->mtable->defaultmedia = 0x800;
@@ -192,7 +192,7 @@ void __devinit tulip_parse_eeprom(struct net_device *dev)
break;
}
}
- if (eeprom_fixups[i].name == NULL) { /* No fixup found. */
+ if (!eeprom_fixups[i].name) { /* No fixup found. */
pr_info("%s: Old style EEPROM with no media selection information\n",
dev->name);
return;
@@ -230,7 +230,7 @@ subsequent_board:
mtable = kmalloc(sizeof(struct mediatable) +
count * sizeof(struct medialeaf),
GFP_KERNEL);
- if (mtable == NULL)
+ if (!mtable)
return; /* Horrible, impossible failure. */
last_mediatable = tp->mtable = mtable;
mtable->defaultmedia = media;
diff --git a/drivers/net/tulip/interrupt.c b/drivers/net/tulip/interrupt.c
index 5350d75..1a1bff5 100644
--- a/drivers/net/tulip/interrupt.c
+++ b/drivers/net/tulip/interrupt.c
@@ -68,12 +68,12 @@ int tulip_refill_rx(struct net_device *dev)
/* Refill the Rx ring buffers. */
for (; tp->cur_rx - tp->dirty_rx > 0; tp->dirty_rx++) {
entry = tp->dirty_rx % RX_RING_SIZE;
- if (tp->rx_buffers[entry].skb == NULL) {
+ if (!tp->rx_buffers[entry].skb) {
struct sk_buff *skb;
dma_addr_t mapping;
skb = tp->rx_buffers[entry].skb = dev_alloc_skb(PKT_BUF_SZ);
- if (skb == NULL)
+ if (!skb)
break;
mapping = pci_map_single(tp->pdev, skb->data, PKT_BUF_SZ,
@@ -205,7 +205,7 @@ int tulip_poll(struct napi_struct *napi, int budget)
/* Check if the packet is long enough to accept without copying
to a minimally-sized skbuff. */
if (pkt_len < tulip_rx_copybreak &&
- (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
+ (skb = dev_alloc_skb(pkt_len + 2))) {
skb_reserve(skb, 2); /* 16 byte align the IP header */
pci_dma_sync_single_for_cpu(tp->pdev,
tp->rx_buffers[entry].mapping,
@@ -311,7 +311,7 @@ int tulip_poll(struct napi_struct *napi, int budget)
tulip_refill_rx(dev);
/* If RX ring is not full we are out of memory. */
- if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
+ if (!tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb)
goto oom;
/* Remove us from polling list and enable RX intr. */
@@ -334,10 +334,10 @@ int tulip_poll(struct napi_struct *napi, int budget)
not_done:
if (tp->cur_rx - tp->dirty_rx > RX_RING_SIZE/2 ||
- tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
+ !tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb)
tulip_refill_rx(dev);
- if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL)
+ if (!tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb)
goto oom;
return work_done;
@@ -431,7 +431,7 @@ static int tulip_rx(struct net_device *dev)
/* Check if the packet is long enough to accept without copying
to a minimally-sized skbuff. */
if (pkt_len < tulip_rx_copybreak &&
- (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
+ (skb = dev_alloc_skb(pkt_len + 2))) {
skb_reserve(skb, 2); /* 16 byte align the IP header */
pci_dma_sync_single_for_cpu(tp->pdev,
tp->rx_buffers[entry].mapping,
@@ -591,7 +591,7 @@ irqreturn_t tulip_interrupt(int irq, void *dev_instance)
break; /* It still has not been Txed */
/* Check for Rx filter setup frames. */
- if (tp->tx_buffers[entry].skb == NULL) {
+ if (!tp->tx_buffers[entry].skb) {
/* test because dummy frames not mapped */
if (tp->tx_buffers[entry].mapping)
pci_unmap_single(tp->pdev,
@@ -775,7 +775,7 @@ irqreturn_t tulip_interrupt(int irq, void *dev_instance)
/* check if the card is in suspend mode */
entry = tp->dirty_rx % RX_RING_SIZE;
- if (tp->rx_buffers[entry].skb == NULL) {
+ if (!tp->rx_buffers[entry].skb) {
if (tulip_debug > 1)
dev_warn(&dev->dev,
"in rx suspend mode: (%lu) (tp->cur_rx = %u, ttimer = %d, rx = %d) go/stay in suspend mode\n",
diff --git a/drivers/net/tulip/timer.c b/drivers/net/tulip/timer.c
index 2017faf..afc5445 100644
--- a/drivers/net/tulip/timer.c
+++ b/drivers/net/tulip/timer.c
@@ -43,7 +43,7 @@ void tulip_media_task(struct work_struct *work)
default: {
struct medialeaf *mleaf;
unsigned char *p;
- if (tp->mtable == NULL) { /* No EEPROM info, use generic code. */
+ if (!tp->mtable) { /* No EEPROM info, use generic code. */
/* Not much that can be done.
Assume this a generic MII or SYM transceiver. */
next_tick = 60*HZ;
diff --git a/drivers/net/tulip/tulip_core.c b/drivers/net/tulip/tulip_core.c
index 82f8764..0ab2465 100644
--- a/drivers/net/tulip/tulip_core.c
+++ b/drivers/net/tulip/tulip_core.c
@@ -384,7 +384,7 @@ static void tulip_up(struct net_device *dev)
/* Allow selecting a default media. */
i = 0;
- if (tp->mtable == NULL)
+ if (!tp->mtable)
goto media_picked;
if (dev->if_port) {
int looking_for = tulip_media_cap[dev->if_port] & MediaIsMII ? 11 :
@@ -642,7 +642,7 @@ static void tulip_init_ring(struct net_device *dev)
use skb_reserve() to align the IP header! */
struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
tp->rx_buffers[i].skb = skb;
- if (skb == NULL)
+ if (!skb)
break;
mapping = pci_map_single(tp->pdev, skb->data,
PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
@@ -728,7 +728,7 @@ static void tulip_clean_tx_ring(struct tulip_private *tp)
}
/* Check for Tx filter setup frames. */
- if (tp->tx_buffers[entry].skb == NULL) {
+ if (!tp->tx_buffers[entry].skb) {
/* test because dummy frames not mapped */
if (tp->tx_buffers[entry].mapping)
pci_unmap_single(tp->pdev,
@@ -821,7 +821,7 @@ static void tulip_free_ring (struct net_device *dev)
for (i = 0; i < TX_RING_SIZE; i++) {
struct sk_buff *skb = tp->tx_buffers[i].skb;
- if (skb != NULL) {
+ if (skb) {
pci_unmap_single(tp->pdev, tp->tx_buffers[i].mapping,
skb->len, PCI_DMA_TODEVICE);
dev_kfree_skb (skb);
@@ -1900,12 +1900,15 @@ static int tulip_resume(struct pci_dev *pdev)
if (!netif_running(dev))
return 0;
- if ((retval = pci_enable_device(pdev))) {
+ retval = pci_enable_device(pdev);
+ if (retval) {
pr_err("pci_enable_device failed in resume\n");
return retval;
}
- if ((retval = request_irq(dev->irq, tulip_interrupt, IRQF_SHARED, dev->name, dev))) {
+ retval = request_irq(dev->irq, tulip_interrupt, IRQF_SHARED,
+ dev->name, dev);
+ if (retval) {
pr_err("request_irq failed in resume\n");
return retval;
}
diff --git a/drivers/net/tulip/uli526x.c b/drivers/net/tulip/uli526x.c
index 9e63f40..a6f6a9e 100644
--- a/drivers/net/tulip/uli526x.c
+++ b/drivers/net/tulip/uli526x.c
@@ -286,7 +286,7 @@ static int __devinit uli526x_init_one (struct pci_dev *pdev,
/* Init network device */
dev = alloc_etherdev(sizeof(*db));
- if (dev == NULL)
+ if (!dev)
return -ENOMEM;
SET_NETDEV_DEV(dev, &pdev->dev);
@@ -324,14 +324,12 @@ static int __devinit uli526x_init_one (struct pci_dev *pdev,
/* Allocate Tx/Rx descriptor memory */
db->desc_pool_ptr = pci_alloc_consistent(pdev, sizeof(struct tx_desc) * DESC_ALL_CNT + 0x20, &db->desc_pool_dma_ptr);
- if(db->desc_pool_ptr == NULL)
- {
+ if (!db->desc_pool_ptr) {
err = -ENOMEM;
goto err_out_nomem;
}
db->buf_pool_ptr = pci_alloc_consistent(pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4, &db->buf_pool_dma_ptr);
- if(db->buf_pool_ptr == NULL)
- {
+ if (!db->buf_pool_ptr) {
err = -ENOMEM;
goto err_out_nomem;
}
@@ -404,7 +402,7 @@ err_out_nomem:
pci_free_consistent(pdev, sizeof(struct tx_desc) * DESC_ALL_CNT + 0x20,
db->desc_pool_ptr, db->desc_pool_dma_ptr);
- if(db->buf_pool_ptr != NULL)
+ if (db->buf_pool_ptr)
pci_free_consistent(pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
db->buf_pool_ptr, db->buf_pool_dma_ptr);
err_out_disable:
@@ -844,7 +842,7 @@ static void uli526x_rx_packet(struct net_device *dev, struct uli526x_board_info
/* Good packet, send to upper layer */
/* Shorst packet used new SKB */
if ((rxlen < RX_COPY_SIZE) &&
- (((new_skb = dev_alloc_skb(rxlen + 2)) != NULL))) {
+ (new_skb = dev_alloc_skb(rxlen + 2))) {
skb = new_skb;
/* size less than COPY_SIZE, allocate a rxlen SKB */
skb_reserve(skb, 2); /* 16byte align */
@@ -1440,7 +1438,8 @@ static void allocate_rx_buffer(struct uli526x_board_info *db)
rxptr = db->rx_insert_ptr;
while(db->rx_avail_cnt < RX_DESC_CNT) {
- if ( ( skb = dev_alloc_skb(RX_ALLOC_SIZE) ) == NULL )
+ skb = dev_alloc_skb(RX_ALLOC_SIZE);
+ if (!skb)
break;
rxptr->rx_skb_ptr = skb; /* FIXME (?) */
rxptr->rdes2 = cpu_to_le32(pci_map_single(db->pdev,
diff --git a/drivers/net/tulip/winbond-840.c b/drivers/net/tulip/winbond-840.c
index 862eadf..a957e72 100644
--- a/drivers/net/tulip/winbond-840.c
+++ b/drivers/net/tulip/winbond-840.c
@@ -647,7 +647,8 @@ static int netdev_open(struct net_device *dev)
if (debug > 1)
netdev_dbg(dev, "w89c840_open() irq %d\n", dev->irq);
- if((i=alloc_ringdesc(dev)))
+ i = alloc_ringdesc(dev);
+ if (i)
goto out_err;
spin_lock_irq(&np->lock);
@@ -817,7 +818,7 @@ static void init_rxtx_rings(struct net_device *dev)
for (i = 0; i < RX_RING_SIZE; i++) {
struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
np->rx_skbuff[i] = skb;
- if (skb == NULL)
+ if (!skb)
break;
np->rx_addr[i] = pci_map_single(np->pci_dev,skb->data,
np->rx_buf_sz,PCI_DMA_FROMDEVICE);
@@ -1231,7 +1232,7 @@ static int netdev_rx(struct net_device *dev)
/* Check if the packet is long enough to accept without copying
to a minimally-sized skbuff. */
if (pkt_len < rx_copybreak &&
- (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
+ (skb = dev_alloc_skb(pkt_len + 2))) {
skb_reserve(skb, 2); /* 16 byte align the IP header */
pci_dma_sync_single_for_cpu(np->pci_dev,np->rx_addr[entry],
np->rx_skbuff[entry]->len,
@@ -1269,10 +1270,10 @@ static int netdev_rx(struct net_device *dev)
for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
struct sk_buff *skb;
entry = np->dirty_rx % RX_RING_SIZE;
- if (np->rx_skbuff[entry] == NULL) {
+ if (!np->rx_skbuff[entry]) {
skb = dev_alloc_skb(np->rx_buf_sz);
np->rx_skbuff[entry] = skb;
- if (skb == NULL)
+ if (!skb)
break; /* Better luck next round. */
np->rx_addr[entry] = pci_map_single(np->pci_dev,
skb->data,
@@ -1618,7 +1619,8 @@ static int w840_resume (struct pci_dev *pdev)
if (netif_device_present(dev))
goto out; /* device not suspended */
if (netif_running(dev)) {
- if ((retval = pci_enable_device(pdev))) {
+ retval = pci_enable_device(pdev);
+ if (retval) {
dev_err(&dev->dev,
"pci_enable_device failed in resume\n");
goto out;
diff --git a/drivers/net/tulip/xircom_cb.c b/drivers/net/tulip/xircom_cb.c
index 988b8eb..1cb7208 100644
--- a/drivers/net/tulip/xircom_cb.c
+++ b/drivers/net/tulip/xircom_cb.c
@@ -230,12 +230,12 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
/* Allocate the send/receive buffers */
private->rx_buffer = pci_alloc_consistent(pdev,8192,&private->rx_dma_handle);
- if (private->rx_buffer == NULL) {
+ if (!private->rx_buffer) {
pr_err("%s: no memory for rx buffer\n", __func__);
goto rx_buf_fail;
}
private->tx_buffer = pci_alloc_consistent(pdev,8192,&private->tx_dma_handle);
- if (private->tx_buffer == NULL) {
+ if (!private->tx_buffer) {
pr_err("%s: no memory for tx buffer\n", __func__);
goto tx_buf_fail;
}
@@ -546,8 +546,8 @@ static void setup_descriptors(struct xircom_private *card)
u32 address;
int i;
- BUG_ON(card->rx_buffer == NULL);
- BUG_ON(card->tx_buffer == NULL);
+ BUG_ON(!card->rx_buffer);
+ BUG_ON(!card->tx_buffer);
/* Receive descriptors */
memset(card->rx_buffer, 0, 128); /* clear the descriptors */
@@ -1086,7 +1086,7 @@ investigate_read_descriptor(struct net_device *dev, struct xircom_private *card,
}
skb = dev_alloc_skb(pkt_len + 2);
- if (skb == NULL) {
+ if (!skb) {
dev->stats.rx_dropped++;
goto out;
}
@@ -1125,7 +1125,7 @@ investigate_write_descriptor(struct net_device *dev,
}
#endif
if (status > 0) { /* bit 31 is 0 when done */
- if (card->tx_skb[descnr]!=NULL) {
+ if (card->tx_skb[descnr]) {
dev->stats.tx_bytes += card->tx_skb[descnr]->len;
dev_kfree_skb_irq(card->tx_skb[descnr]);
}
> o in general, HW doesn't return signed integer values. Where possible,
> I prefer to see "unsigned int status;" and "if (status)".
That one is yours to change if you want.
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