Re: [patch] forcedeth: fix the NAPI poll function

From: Jeff Garzik
Date: Tue Oct 16 2007 - 01:47:50 EST


Ingo Molnar wrote:
* Jeff Garzik <jgarzik@xxxxxxxxx> wrote:

Two comments:

1) we have a vague definition of "RX work processed." Due to error conditions and goto's in that function, rx_processed_cnt may or may not equal the number of packets actually processed.

2) man I dislike these inline C statement combinations (ranting at original code style, not you). I would much rather waste a few extra lines of source code and make the conditions obvious:

while (... && (rx_processed_cnt < limit)) {
rx_processed_cnt++;

...
}

or even

while (1) {
...
if (rx_processed_cnt == limit)
break;
rx_processed_cnt++;
}

The compiler certainly doesn't care, and IMO it prevents bugs.

agreed. Do you have an uptodate patch/git-URI for the forcedeth rewrite you did? I can throw it into the testbed.

Branch 'fe-lock' of
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6.git

It works here locally, but at this very minute I am rewriting those changesets yet again :)

Jeff



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