Re: 2.2.4 and token ring

Adrian Bridgett (adrian.bridgett@zetnet.co.uk)
Fri, 26 Mar 1999 20:41:16 +0000

On Fri, Mar 26, 1999 at 12:29:26AM +0100, Paul Norton wrote:
> Derick H Siddoway writes:
> > Mar 23 16:17:26 slc-sunny kernel: tr0: using irq 10, PIOaddr a20, 8K shared
> > RAM.
>
> Try setting your shared RAM to 16K for now if possible, and see if
> that improves things. I've had reports of receiver congestion at 8K.
> This may or may not have bearing on the problem.
>
> > Mar 23 16:37:01 slc-sunny kernel: tr0: tx request but no packet!
>
> That's a first. In my 2.5 years of maintining the driver I've never
> seen _that_ message. In fact that error message isn't in the driver
> code at all (ibmtr.[ch]). I wonder what generates it. Is this a
> laptop?

It was in around 2.1.132 ->2.2.3 sort of timescale (possibly in an -ac
patch). There was a bug fix which changed a de-reference into a test and
printk:

static void tr_tx(struct device *dev)
{
struct tok_info *ti=(struct tok_info *) dev->priv;
struct trh_hdr *trhdr;
unsigned int hdr_len;
__u32 dhb;
unsigned char xmit_command;
int i;
struct trllc *llc;

if(ti->current_skb==NULL)
{
printk(KERN_ERR "%s: tx request but no packet!\n",
dev->name);
dev->tbusy=0;
mark_bh(NET_BH);
return;
}

HTH

Adrian

email: adrian.bridgett@zetnet.co.uk, http://www.poboxes.com/adrian.bridgett
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