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Drivers: net: hyperv: Cleanup the netvsc receive callback functio 

Get rid of the buffer allocation in the receive path for normal packets.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
KY Srinivasan 2014-02-16 16:38:45 -08:00 committed by David S. Miller
parent 97c1723a61
commit ee0c4c39c5
2 changed files with 12 additions and 23 deletions
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2
drivers/net/hyperv/hyperv_net.h
View File

@ -506,6 +506,8 @@ struct netvsc_device {
/* Holds rndis device info */
void *extension;
/* The recive buffer for this device */
unsigned char cb_buffer[NETVSC_PACKET_SIZE];
};
/* NdisInitialize message */

33
drivers/net/hyperv/netvsc.c
View File

@ -795,22 +795,16 @@ static void netvsc_channel_cb(void *context)
struct netvsc_device *net_device;
u32 bytes_recvd;
u64 request_id;
unsigned char *packet;
struct vmpacket_descriptor *desc;
unsigned char *buffer;
int bufferlen = NETVSC_PACKET_SIZE;
struct net_device *ndev;
packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char),
GFP_ATOMIC);
if (!packet)
return;
buffer = packet;
net_device = get_inbound_net_device(device);
if (!net_device)
goto out;
return;
ndev = net_device->ndev;
buffer = net_device->cb_buffer;
do {
ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen,
@ -838,23 +832,16 @@ static void netvsc_channel_cb(void *context)
break;
}
/* reset */
if (bufferlen > NETVSC_PACKET_SIZE) {
kfree(buffer);
buffer = packet;
bufferlen = NETVSC_PACKET_SIZE;
}
} else {
/* reset */
if (bufferlen > NETVSC_PACKET_SIZE) {
kfree(buffer);
buffer = packet;
bufferlen = NETVSC_PACKET_SIZE;
}
/*
* We are done for this pass.
*/
break;
}
} else if (ret == -ENOBUFS) {
if (bufferlen > NETVSC_PACKET_SIZE)
kfree(buffer);
/* Handle large packet */
buffer = kmalloc(bytes_recvd, GFP_ATOMIC);
if (buffer == NULL) {
@ -869,8 +856,8 @@ static void netvsc_channel_cb(void *context)
}
} while (1);
out:
kfree(buffer);
if (bufferlen > NETVSC_PACKET_SIZE)
kfree(buffer);
return;
}