diff options
author | Jesper Juhl <juhl-lkml@dif.dk> | 2005-05-03 14:33:27 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2005-05-03 14:33:27 -0700 |
commit | 6a5d362120a61a719095443194cc2d5e9a7027dd (patch) | |
tree | 7cab13ff0d252b96f4eeda7475f805ffdd1c0c4a /drivers/net/wan/pc300_tty.c | |
parent | db46edc6d3b66bf708a8f23a9aa89f63a49ebe33 (diff) | |
download | kernel_samsung_tuna-6a5d362120a61a719095443194cc2d5e9a7027dd.zip kernel_samsung_tuna-6a5d362120a61a719095443194cc2d5e9a7027dd.tar.gz kernel_samsung_tuna-6a5d362120a61a719095443194cc2d5e9a7027dd.tar.bz2 |
[WAN]: kfree of NULL pointer is valid
kfree(0) is perfectly valid, checking pointers for NULL before calling
kfree() on them is redundant. The patch below cleans away a few such
redundant checks (and while I was around some of those bits I couldn't
stop myself from making a few tiny whitespace changes as well).
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/wan/pc300_tty.c')
-rw-r--r-- | drivers/net/wan/pc300_tty.c | 27 |
1 files changed, 11 insertions, 16 deletions
diff --git a/drivers/net/wan/pc300_tty.c b/drivers/net/wan/pc300_tty.c index 29f84ad..8454bf6 100644 --- a/drivers/net/wan/pc300_tty.c +++ b/drivers/net/wan/pc300_tty.c @@ -400,10 +400,8 @@ static void cpc_tty_close(struct tty_struct *tty, struct file *flip) cpc_tty->buf_rx.last = NULL; } - if (cpc_tty->buf_tx) { - kfree(cpc_tty->buf_tx); - cpc_tty->buf_tx = NULL; - } + kfree(cpc_tty->buf_tx); + cpc_tty->buf_tx = NULL; CPC_TTY_DBG("%s: TTY closed\n",cpc_tty->name); @@ -666,7 +664,7 @@ static void cpc_tty_rx_work(void * data) unsigned long port; int i, j; st_cpc_tty_area *cpc_tty; - volatile st_cpc_rx_buf * buf; + volatile st_cpc_rx_buf *buf; char flags=0,flg_rx=1; struct tty_ldisc *ld; @@ -680,9 +678,9 @@ static void cpc_tty_rx_work(void * data) cpc_tty = &cpc_tty_area[port]; if ((buf=cpc_tty->buf_rx.first) != 0) { - if(cpc_tty->tty) { + if (cpc_tty->tty) { ld = tty_ldisc_ref(cpc_tty->tty); - if(ld) { + if (ld) { if (ld->receive_buf) { CPC_TTY_DBG("%s: call line disc. receive_buf\n",cpc_tty->name); ld->receive_buf(cpc_tty->tty, (char *)(buf->data), &flags, buf->size); @@ -691,7 +689,7 @@ static void cpc_tty_rx_work(void * data) } } cpc_tty->buf_rx.first = cpc_tty->buf_rx.first->next; - kfree((unsigned char *)buf); + kfree(buf); buf = cpc_tty->buf_rx.first; flg_rx = 1; } @@ -733,7 +731,7 @@ static void cpc_tty_rx_disc_frame(pc300ch_t *pc300chan) void cpc_tty_receive(pc300dev_t *pc300dev) { - st_cpc_tty_area *cpc_tty; + st_cpc_tty_area *cpc_tty; pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan; pc300_t *card = (pc300_t *)pc300chan->card; int ch = pc300chan->channel; @@ -742,7 +740,7 @@ void cpc_tty_receive(pc300dev_t *pc300dev) int rx_len, rx_aux; volatile unsigned char status; unsigned short first_bd = pc300chan->rx_first_bd; - st_cpc_rx_buf *new=NULL; + st_cpc_rx_buf *new = NULL; unsigned char dsr_rx; if (pc300dev->cpc_tty == NULL) { @@ -762,7 +760,7 @@ void cpc_tty_receive(pc300dev_t *pc300dev) if (status & DST_EOM) { break; } - ptdescr=(pcsca_bd_t __iomem *)(card->hw.rambase+cpc_readl(&ptdescr->next)); + ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase+cpc_readl(&ptdescr->next)); } if (!rx_len) { @@ -771,10 +769,7 @@ void cpc_tty_receive(pc300dev_t *pc300dev) cpc_writel(card->hw.scabase + DRX_REG(EDAL, ch), RX_BD_ADDR(ch, pc300chan->rx_last_bd)); } - if (new) { - kfree(new); - new = NULL; - } + kfree(new); return; } @@ -787,7 +782,7 @@ void cpc_tty_receive(pc300dev_t *pc300dev) continue; } - new = (st_cpc_rx_buf *) kmalloc(rx_len + sizeof(st_cpc_rx_buf), GFP_ATOMIC); + new = (st_cpc_rx_buf *)kmalloc(rx_len + sizeof(st_cpc_rx_buf), GFP_ATOMIC); if (new == 0) { cpc_tty_rx_disc_frame(pc300chan); continue; |