mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 16:30:52 +07:00
drivers: net: usb: pegasus: remove skb pool
The socket buffer pool for the receive path is now gone. It's existence didn't make much difference (performance-wise) and the code is better off without the spinlocks protecting it. Signed-off-by: Petko Manolov <petkan@nucleusys.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petko Manolov
David S. Miller
parent
5f5624cf15
commit
313a58e487
@ -575,51 +575,6 @@ static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void fill_skb_pool(pegasus_t *pegasus)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < RX_SKBS; i++) {
|
||||
if (pegasus->rx_pool[i])
|
||||
continue;
|
||||
pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
|
||||
/*
|
||||
** we give up if the allocation fail. the tasklet will be
|
||||
** rescheduled again anyway...
|
||||
*/
|
||||
if (pegasus->rx_pool[i] == NULL)
|
||||
return;
|
||||
skb_reserve(pegasus->rx_pool[i], 2);
|
||||
}
|
||||
}
|
||||
|
||||
static void free_skb_pool(pegasus_t *pegasus)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < RX_SKBS; i++) {
|
||||
if (pegasus->rx_pool[i]) {
|
||||
dev_kfree_skb(pegasus->rx_pool[i]);
|
||||
pegasus->rx_pool[i] = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
|
||||
{
|
||||
int i;
|
||||
struct sk_buff *skb;
|
||||
|
||||
for (i = 0; i < RX_SKBS; i++) {
|
||||
if (likely(pegasus->rx_pool[i] != NULL)) {
|
||||
skb = pegasus->rx_pool[i];
|
||||
pegasus->rx_pool[i] = NULL;
|
||||
return skb;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void read_bulk_callback(struct urb *urb)
|
||||
{
|
||||
pegasus_t *pegasus = urb->context;
|
||||
@ -704,9 +659,8 @@ static void read_bulk_callback(struct urb *urb)
|
||||
if (pegasus->flags & PEGASUS_UNPLUG)
|
||||
return;
|
||||
|
||||
spin_lock(&pegasus->rx_pool_lock);
|
||||
pegasus->rx_skb = pull_skb(pegasus);
|
||||
spin_unlock(&pegasus->rx_pool_lock);
|
||||
pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU,
|
||||
GFP_ATOMIC);
|
||||
|
||||
if (pegasus->rx_skb == NULL)
|
||||
goto tl_sched;
|
||||
@ -734,24 +688,23 @@ static void read_bulk_callback(struct urb *urb)
|
||||
static void rx_fixup(unsigned long data)
|
||||
{
|
||||
pegasus_t *pegasus;
|
||||
unsigned long flags;
|
||||
int status;
|
||||
|
||||
pegasus = (pegasus_t *) data;
|
||||
if (pegasus->flags & PEGASUS_UNPLUG)
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
|
||||
fill_skb_pool(pegasus);
|
||||
if (pegasus->flags & PEGASUS_RX_URB_FAIL)
|
||||
if (pegasus->rx_skb)
|
||||
goto try_again;
|
||||
if (pegasus->rx_skb == NULL)
|
||||
pegasus->rx_skb = pull_skb(pegasus);
|
||||
pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
|
||||
PEGASUS_MTU,
|
||||
GFP_ATOMIC);
|
||||
if (pegasus->rx_skb == NULL) {
|
||||
netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
|
||||
tasklet_schedule(&pegasus->rx_tl);
|
||||
goto done;
|
||||
return;
|
||||
}
|
||||
usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
|
||||
usb_rcvbulkpipe(pegasus->usb, 1),
|
||||
@ -767,8 +720,6 @@ static void rx_fixup(unsigned long data)
|
||||
} else {
|
||||
pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
|
||||
}
|
||||
done:
|
||||
spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
|
||||
}
|
||||
|
||||
static void write_bulk_callback(struct urb *urb)
|
||||
@ -1007,10 +958,9 @@ static int pegasus_open(struct net_device *net)
|
||||
int res;
|
||||
|
||||
if (pegasus->rx_skb == NULL)
|
||||
pegasus->rx_skb = pull_skb(pegasus);
|
||||
/*
|
||||
** Note: no point to free the pool. it is empty :-)
|
||||
*/
|
||||
pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
|
||||
PEGASUS_MTU,
|
||||
GFP_KERNEL);
|
||||
if (!pegasus->rx_skb)
|
||||
return -ENOMEM;
|
||||
|
||||
@ -1044,7 +994,6 @@ static int pegasus_open(struct net_device *net)
|
||||
res = -EIO;
|
||||
usb_kill_urb(pegasus->rx_urb);
|
||||
usb_kill_urb(pegasus->intr_urb);
|
||||
free_skb_pool(pegasus);
|
||||
goto exit;
|
||||
}
|
||||
set_carrier(net);
|
||||
@ -1364,7 +1313,6 @@ static int pegasus_probe(struct usb_interface *intf,
|
||||
pegasus->mii.mdio_write = mdio_write;
|
||||
pegasus->mii.phy_id_mask = 0x1f;
|
||||
pegasus->mii.reg_num_mask = 0x1f;
|
||||
spin_lock_init(&pegasus->rx_pool_lock);
|
||||
pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
|
||||
| NETIF_MSG_PROBE | NETIF_MSG_LINK);
|
||||
|
||||
@ -1376,7 +1324,6 @@ static int pegasus_probe(struct usb_interface *intf,
|
||||
goto out2;
|
||||
}
|
||||
set_ethernet_addr(pegasus);
|
||||
fill_skb_pool(pegasus);
|
||||
if (pegasus->features & PEGASUS_II) {
|
||||
dev_info(&intf->dev, "setup Pegasus II specific registers\n");
|
||||
setup_pegasus_II(pegasus);
|
||||
@ -1404,7 +1351,6 @@ static int pegasus_probe(struct usb_interface *intf,
|
||||
|
||||
out3:
|
||||
usb_set_intfdata(intf, NULL);
|
||||
free_skb_pool(pegasus);
|
||||
out2:
|
||||
free_all_urbs(pegasus);
|
||||
out1:
|
||||
@ -1429,7 +1375,6 @@ static void pegasus_disconnect(struct usb_interface *intf)
|
||||
unregister_netdev(pegasus->net);
|
||||
unlink_all_urbs(pegasus);
|
||||
free_all_urbs(pegasus);
|
||||
free_skb_pool(pegasus);
|
||||
if (pegasus->rx_skb != NULL) {
|
||||
dev_kfree_skb(pegasus->rx_skb);
|
||||
pegasus->rx_skb = NULL;
|
||||
|
||||
@ -13,7 +13,6 @@
|
||||
#define HAS_HOME_PNA 0x40000000
|
||||
|
||||
#define PEGASUS_MTU 1536
|
||||
#define RX_SKBS 4
|
||||
|
||||
#define EPROM_WRITE 0x01
|
||||
#define EPROM_READ 0x02
|
||||
@ -97,11 +96,9 @@ typedef struct pegasus {
|
||||
struct tasklet_struct rx_tl;
|
||||
struct delayed_work carrier_check;
|
||||
struct urb *ctrl_urb, *rx_urb, *tx_urb, *intr_urb;
|
||||
struct sk_buff *rx_pool[RX_SKBS];
|
||||
struct sk_buff *rx_skb;
|
||||
struct usb_ctrlrequest dr;
|
||||
wait_queue_head_t ctrl_wait;
|
||||
spinlock_t rx_pool_lock;
|
||||
int chip;
|
||||
unsigned char intr_buff[8];
|
||||
__u8 tx_buff[PEGASUS_MTU];
|
||||
|
||||
Loading…
Reference in New Issue
Block a user