* [PATCH] 2.6.15: via-rhine + link loss + autoneg off == trouble
@ 2006-01-07 16:20 Denis Vlasenko
2006-01-07 18:47 ` Lee Revell
0 siblings, 1 reply; 5+ messages in thread
From: Denis Vlasenko @ 2006-01-07 16:20 UTC (permalink / raw)
To: Jeff Garzik; +Cc: linux-kernel
[-- Attachment #1: Type: text/plain, Size: 2490 bytes --]
Hi,
2.6.15 still exhibits the via rhine "no tx" syndrome.
Again, the recipe:
* have via-rhine NIC
* unplug network cable
* reboot box
* force HDX (I do in with ethtool -s if autoneg off duplex half)
* plug cable back
* kernel still thinks that carrier is off despite "ethtool if"
saying that link is detected.
Why:
...
if (intr_status & IntrLinkChange)
rhine_check_media(dev, 0);
...
static void rhine_check_media(struct net_device *dev, unsigned int init_media)
{
struct rhine_private *rp = netdev_priv(dev);
void __iomem *ioaddr = rp->base;
mii_check_media(&rp->mii_if, debug, init_media);
...
unsigned int mii_check_media (struct mii_if_info *mii,
unsigned int ok_to_print,
unsigned int init_media)
{
unsigned int old_carrier, new_carrier;
int advertise, lpa, media, duplex;
int lpa2 = 0;
/* if forced media, go no further */
if (mii->force_media) <============================ HERE
return 0; /* duplex did not change */
/* check current and old link status */
old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0;
new_carrier = (unsigned int) mii_link_ok(mii);
/* if carrier state did not change, this is a "bounce",
* just exit as everything is already set correctly
*/
if ((!init_media) && (old_carrier == new_carrier))
return 0; /* duplex did not change */
/* no carrier, nothing much to do */
if (!new_carrier) {
netif_carrier_off(mii->dev);
if (ok_to_print)
printk(KERN_INFO "%s: link down\n", mii->dev->name);
return 0; /* duplex did not change */
}
/*
* we have carrier, see who's on the other end
*/
netif_carrier_on(mii->dev);
...
We can never reach netif_carrier_on if mii->force_media is true!
> On Friday 11 November 2005 13:32, Jeff Garzik wrote:
> > As I've explained many times at this point, force_media means that link
> > is always on, and mii_link_ok() should not be called.
>
> Sorry, seems like I missed your mails...
>
> > The only bug, it seems, is that the "if (mii->force_media)" branch
> > should make sure to call netif_carrier_on()
>
> Should also work.
Please find patch attached.
--
vda
[-- Attachment #2: linux-2.6.15.fix_no_tx_syndrome.diff --]
[-- Type: text/x-diff, Size: 465 bytes --]
--- linux-2.6.15.org/drivers/net/mii.c Fri Dec 30 14:17:47 2005
+++ linux-2.6.15/drivers/net/mii.c Sat Jan 7 18:15:27 2006
@@ -267,8 +267,10 @@ unsigned int mii_check_media (struct mii
int lpa2 = 0;
/* if forced media, go no further */
- if (mii->force_media)
+ if (mii->force_media) {
+ netif_carrier_on(mii->dev);
return 0; /* duplex did not change */
+ }
/* check current and old link status */
old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0;
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] 2.6.15: via-rhine + link loss + autoneg off == trouble
2006-01-07 16:20 [PATCH] 2.6.15: via-rhine + link loss + autoneg off == trouble Denis Vlasenko
@ 2006-01-07 18:47 ` Lee Revell
2006-01-07 21:04 ` Roger Luethi
0 siblings, 1 reply; 5+ messages in thread
From: Lee Revell @ 2006-01-07 18:47 UTC (permalink / raw)
To: Denis Vlasenko; +Cc: Jeff Garzik, linux-kernel
On Sat, 2006-01-07 at 18:20 +0200, Denis Vlasenko wrote:
> Hi,
>
> 2.6.15 still exhibits the via rhine "no tx" syndrome.
Well you didn't cc: the via-rhine maintainer (Roger Luethi), no wonder
the patch didn't get picked up...
Lee
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] 2.6.15: via-rhine + link loss + autoneg off == trouble
2006-01-07 18:47 ` Lee Revell
@ 2006-01-07 21:04 ` Roger Luethi
2006-01-08 17:57 ` Denis Vlasenko
0 siblings, 1 reply; 5+ messages in thread
From: Roger Luethi @ 2006-01-07 21:04 UTC (permalink / raw)
To: Lee Revell; +Cc: Denis Vlasenko, Jeff Garzik, linux-kernel
On Sat, 07 Jan 2006 13:47:50 -0500, Lee Revell wrote:
> On Sat, 2006-01-07 at 18:20 +0200, Denis Vlasenko wrote:
> > Hi,
> >
> > 2.6.15 still exhibits the via rhine "no tx" syndrome.
>
> Well you didn't cc: the via-rhine maintainer (Roger Luethi), no wonder
> the patch didn't get picked up...
As long as you mention via-rhine, I am going to see it (thanks, procmail).
I don't remember seeing vda post a patch before. First he posted a problem
description, then an analysis (that I commented on), now a patch. Finally,
this is not a via-rhine problem. It's a problem in the mii code and
affects other drivers as well (those that use the generic mii code).
Roger
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] 2.6.15: via-rhine + link loss + autoneg off == trouble
2006-01-07 21:04 ` Roger Luethi
@ 2006-01-08 17:57 ` Denis Vlasenko
2006-01-08 18:03 ` Roger Luethi
0 siblings, 1 reply; 5+ messages in thread
From: Denis Vlasenko @ 2006-01-08 17:57 UTC (permalink / raw)
To: Roger Luethi; +Cc: Lee Revell, Jeff Garzik, linux-kernel
On Saturday 07 January 2006 23:04, Roger Luethi wrote:
> On Sat, 07 Jan 2006 13:47:50 -0500, Lee Revell wrote:
> > On Sat, 2006-01-07 at 18:20 +0200, Denis Vlasenko wrote:
> > > Hi,
> > >
> > > 2.6.15 still exhibits the via rhine "no tx" syndrome.
> >
> > Well you didn't cc: the via-rhine maintainer (Roger Luethi), no wonder
> > the patch didn't get picked up...
> As long as you mention via-rhine, I am going to see it (thanks, procmail).
> I don't remember seeing vda post a patch before. First he posted a problem
> description, then an analysis (that I commented on), now a patch. Finally,
It's my second patch for this (really trivial) problem.
--
vda
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] 2.6.15: via-rhine + link loss + autoneg off == trouble
2006-01-08 17:57 ` Denis Vlasenko
@ 2006-01-08 18:03 ` Roger Luethi
0 siblings, 0 replies; 5+ messages in thread
From: Roger Luethi @ 2006-01-08 18:03 UTC (permalink / raw)
To: Denis Vlasenko; +Cc: Lee Revell, Jeff Garzik, linux-kernel
On Sun, 08 Jan 2006 19:57:14 +0200, Denis Vlasenko wrote:
> On Saturday 07 January 2006 23:04, Roger Luethi wrote:
> > As long as you mention via-rhine, I am going to see it (thanks, procmail).
> > I don't remember seeing vda post a patch before. First he posted a problem
> > description, then an analysis (that I commented on), now a patch. Finally,
>
> It's my second patch for this (really trivial) problem.
Duly noted :-). Sorry I missed it the first time around.
Roger
^ permalink raw reply [flat|nested] 5+ messages in thread
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2006-01-07 16:20 [PATCH] 2.6.15: via-rhine + link loss + autoneg off == trouble Denis Vlasenko
2006-01-07 18:47 ` Lee Revell
2006-01-07 21:04 ` Roger Luethi
2006-01-08 17:57 ` Denis Vlasenko
2006-01-08 18:03 ` Roger Luethi
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