[lkml]   [2006]   [Nov]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 3/4] atl1: Main C file for Attansic L1 driver
Stephen Hemminger wrote:
> On Mon, 20 Nov 2006 14:35:10 -0500
> Jeff Garzik <> wrote:
>> Stephen Hemminger wrote:
>>> Using common MII code is good, but one problem with the existing MII code is that
>>> it doesn't work when device is down. This makes it impossible to set speed/duplex
>>> before device comes up.
>> That's not true at all. drivers/net/mii.c uses caller-provided locking
>> in all cases, and there is nothing that prevents the common code from
>> being called when the interface is down.
>> You are probably thinking about all the netif_running() checks found in
>> the drivers, particularly in the ->begin() hook.
>> Jeff
> Yeah it is a driver specific thing. All users of mii seem to block changes so
> I thought it was in base code.

Yeah. As a bit of history, a lot of drivers would power down the phy
when the interface was down, and so MII would need to be inaccessible.
But that's really a driver policy thing. If the driver provides a
"don't power down phy, when interface is downed" knob, maybe it would
want to support MII operations when !netif_running().


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-11-20 22:39    [W:0.044 / U:114.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site