From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 7 Mar 2007 16:37:38 +0000 (+0000)
Subject: z85230: Fix FIFO handling
X-Git-Tag: v2.6.21-rc4~70^2~3
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe79745507593941adb44a6b2e392645c54ca1c2;p=linux-2.6

z85230: Fix FIFO handling

We must exit immediately on a FIFO fill not take the end of packet path
otherwise each underrun in PIO transmit mode causes a runt packet and the
data is lost.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/wan/z85230.c b/drivers/net/wan/z85230.c
index 8dbcf83bb5..8b4540bfc1 100644
--- a/drivers/net/wan/z85230.c
+++ b/drivers/net/wan/z85230.c
@@ -407,7 +407,7 @@ static void z8530_tx(struct z8530_channel *c)
 	while(c->txcount) {
 		/* FIFO full ? */
 		if(!(read_zsreg(c, R0)&4))
-			break;
+			return;
 		c->txcount--;
 		/*
 		 *	Shovel out the byte