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stopped memory leak in natsemi::nat_open()

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This commit is contained in:
Udayan Kumar 2007-07-08 11:03:30 -04:00
parent 83dd194330
commit 132d0fb70c
1 changed files with 15 additions and 12 deletions
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27
src/drivers/net/natsemi.c
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@ -49,7 +49,8 @@
/* Revision History */
/*
02 JUL 2007 Udayan Kumar 1.2 ported the driver from etherboot to gPXE API
02 JUL 2007 Udayan Kumar 1.2 ported the driver from etherboot to gPXE API.
Fully rewritten,adapting the old driver.
Added a circular buffer for transmit and receive.
transmit routine will not wait for transmission to finish.
poll routine deals with it.
@ -366,10 +367,9 @@ static int nat_open ( struct net_device *netdev ) {
*/
nat->rx_cur=0;
for (i=0;i<NUM_RX_DESC;i++) {
nat->iobuf[i] = alloc_iob ( RX_BUF_SIZE );
if (!nat->iobuf[i])
return -ENOMEM;
goto memory_alloc_err;
nat->rx[i].link = virt_to_bus((i+1 < NUM_RX_DESC) ? &nat->rx[i+1] : &nat->rx[0]);
nat->rx[i].cmdsts = (uint32_t) RX_BUF_SIZE;
nat->rx[i].bufptr = virt_to_bus(nat->iobuf[i]->data);
@ -414,8 +414,18 @@ static int nat_open ( struct net_device *netdev ) {
*/
outl((RxOk|RxErr|TxOk|TxErr),nat->ioaddr + IntrMask);
//outl(1,nat->ioaddr +IntrEnable);
return 0;
memory_alloc_err:
/* this block frees the previously allocated buffers
* if memory for all the buffers is not available
*/
i=0;
while(nat->rx[i].cmdsts == (uint32_t) RX_BUF_SIZE) {
free_iob(nat->iobuf[i]);
i++;
}
return -ENOMEM;
}
/**
@ -426,8 +436,6 @@ static int nat_open ( struct net_device *netdev ) {
static void nat_close ( struct net_device *netdev ) {
struct natsemi_nic *nat = netdev->priv;
int i;
/* Reset the hardware to disable everything in one go
*/
nat_reset ( nat );
@ -464,7 +472,7 @@ static int nat_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) {
*/
nat->tx_iobuf[nat->tx_cur]=iobuf;
/* Pad and align packet has been ignored because its not required here
/* Pad and align packet has not been used because its not required here
* iob_pad ( iobuf, ETH_ZLEN ); can be used to achieve it
*/
@ -569,9 +577,7 @@ static void nat_poll ( struct net_device *netdev, unsigned int rx_quota ) {
nat->rx_cur=(nat->rx_cur+1) % NUM_RX_DESC;
rx_status=nat->rx[nat->rx_cur].cmdsts;
}
end:
/* re-enable the potentially idle receive state machine
*/
outl(RxOn, nat->ioaddr + ChipCmd);
@ -646,8 +652,6 @@ static int nat_probe ( struct pci_device *pci,
if ( ( rc = nvo_register ( &nat->nvo ) ) != 0 )
goto err_register_nvo;
}
return 0;
err_register_nvo:
@ -681,7 +685,6 @@ static void nat_remove ( struct pci_device *pci ) {
static struct pci_device_id natsemi_nics[] = {
PCI_ROM(0x100b, 0x0020, "dp83815", "DP83815"),
};
struct pci_driver natsemi_driver __pci_driver = {