Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f90251c8 authored by Haiyang Zhang's avatar Haiyang Zhang Committed by David S. Miller
Browse files

hyperv: Increase the buffer length for netvsc_channel_cb() 



When the buffer is too small for a packet from VMBus, a bigger buffer will be
allocated in netvsc_channel_cb() and retry reading the packet from VMBus.
Increasing this buffer size will reduce the retry overhead.

Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: default avatarDexuan Cui <decui@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c9d26423

drivers/net/hyperv/hyperv_net.h

+2 −2
Original line number Diff line number Diff line
@@ -591,7 +591,7 @@ struct nvsp_message { 


#define NETVSC_RECEIVE_BUFFER_ID		0xcafe



#define NETVSC_PACKET_SIZE                      2048

#define NETVSC_PACKET_SIZE                      4096



#define VRSS_SEND_TAB_SIZE 16
@@ -642,7 +642,7 @@ struct netvsc_device { 
	int ring_size;



	/* The primary channel callback buffer */

	unsigned char cb_buffer[NETVSC_PACKET_SIZE];

	unsigned char *cb_buffer;

	/* The sub channel callback buffer */

	unsigned char *sub_cb_buf;

};

drivers/net/hyperv/netvsc.c

+14 −2
Original line number Diff line number Diff line
@@ -42,6 +42,12 @@ static struct netvsc_device *alloc_net_device(struct hv_device *device) 
	if (!net_device)

		return NULL;



	net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL);

	if (!net_device->cb_buffer) {

		kfree(net_device);

		return NULL;

	}



	init_waitqueue_head(&net_device->wait_drain);

	net_device->start_remove = false;

	net_device->destroy = false;
@@ -52,6 +58,12 @@ static struct netvsc_device *alloc_net_device(struct hv_device *device) 
	return net_device;

}



static void free_netvsc_device(struct netvsc_device *nvdev)

{

	kfree(nvdev->cb_buffer);

	kfree(nvdev);

}



static struct netvsc_device *get_outbound_net_device(struct hv_device *device)

{

	struct netvsc_device *net_device;
@@ -551,7 +563,7 @@ int netvsc_device_remove(struct hv_device *device) 
	if (net_device->sub_cb_buf)

		vfree(net_device->sub_cb_buf);



	kfree(net_device);

	free_netvsc_device(net_device);

	return 0;

}
@@ -1093,7 +1105,7 @@ int netvsc_device_add(struct hv_device *device, void *additional_info) 
	vmbus_close(device->channel);



cleanup:

	kfree(net_device);

	free_netvsc_device(net_device);



	return ret;

}