diff mbox

[RFC,net-next] cxgb4: Do not set net_device::dev_id to VI index

Message ID 1370882053.1933.13.camel@bwh-desktop.uk.level5networks.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Ben Hutchings June 10, 2013, 4:34 p.m. UTC
net_device::dev_id should not be used merely to indicate a VI index,
as it affects the way the local part of IPv6 addresses is normally
generated.

This field was intended for use where multiple devices may share a
single assigned MAC address and need to have different IPv6 addresses.
T4 VIs each have their own MAC address.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
---
Dimitris, I don't know whether my last statement ('VIs each have their
own MAC address') is actually correct.  If not then the driver is quite
right to set dev_id.

Ben.

 drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 1 -
 1 file changed, 1 deletion(-)

Comments

Dimitris Michailidis June 13, 2013, 6:15 a.m. UTC | #1
Ben Hutchings wrote:
> 

> net_device::dev_id should not be used merely to indicate a VI index,

> as it affects the way the local part of IPv6 addresses is normally

> generated.

> 

> This field was intended for use where multiple devices may share a

> single assigned MAC address and need to have different IPv6 addresses.

> T4 VIs each have their own MAC address.

> 

> Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>


Acked-by: Dimitris Michailidis <dm@chelsio.com>


> ---

> Dimitris, I don't know whether my last statement ('VIs each have their

> own MAC address') is actually correct.  If not then the driver is quite

> right to set dev_id.


Ben, yes, VIs have individual MAC addresses.  Thanks for doing the patch.
David Miller June 13, 2013, 8:24 a.m. UTC | #2
From: Dimitrios Michailidis <dm@chelsio.com>
Date: Thu, 13 Jun 2013 06:15:43 +0000

> Ben Hutchings wrote:
>> 
>> net_device::dev_id should not be used merely to indicate a VI index,
>> as it affects the way the local part of IPv6 addresses is normally
>> generated.
>> 
>> This field was intended for use where multiple devices may share a
>> single assigned MAC address and need to have different IPv6 addresses.
>> T4 VIs each have their own MAC address.
>> 
>> Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
> 
> Acked-by: Dimitris Michailidis <dm@chelsio.com>

Applied, thanks.
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diff mbox

Patch

diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index bff89a4..4cbb2f9 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -3782,7 +3782,6 @@  int t4_port_init(struct adapter *adap, int mbox, int pf, int vf)
 		p->lport = j;
 		p->rss_size = rss_size;
 		memcpy(adap->port[i]->dev_addr, addr, ETH_ALEN);
-		adap->port[i]->dev_id = j;
 
 		ret = ntohl(c.u.info.lstatus_to_modtype);
 		p->mdio_addr = (ret & FW_PORT_CMD_MDIOCAP) ?