From 1d8f9e7e5393d5cfd77b2f81f85c1ae88d5583c2 Mon Sep 17 00:00:00 2001
From: mattf <mattf@5390a7c7-147a-4af0-8ec9-7488f05a26cb>
Date: Tue, 23 Jan 2007 21:28:14 +0000
Subject: Make sure we don't clear the interrupt before we might have received
 it in shared interrupt line scenarios.

git-svn-id: http://svn.digium.com/svn/zaptel/branches/1.2@1936 5390a7c7-147a-4af0-8ec9-7488f05a26cb
---
 wct1xxp.c    | 4 ++--
 wctdm.c      | 3 ++-
 wctdm24xxp.c | 4 +++-
 wcte11xp.c   | 4 ++--
 4 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/wct1xxp.c b/wct1xxp.c
index 4aecf27..a0a1e95 100644
--- a/wct1xxp.c
+++ b/wct1xxp.c
@@ -1134,8 +1134,6 @@ ZAP_IRQ_HANDLER(t1xxp_interrupt)
 	int x;
 
 	ints = inb(wc->ioaddr + WC_INTSTAT);
-	outb(ints, wc->ioaddr + WC_INTSTAT);
-
 	if (!ints)
 #ifdef LINUX26
 		return IRQ_NONE;
@@ -1143,6 +1141,8 @@ ZAP_IRQ_HANDLER(t1xxp_interrupt)
 		return;
 #endif		
 
+	outb(ints, wc->ioaddr + WC_INTSTAT);
+
 	if (!wc->intcount) {
 		if (debug) printk("Got interrupt: 0x%04x\n", ints);
 	}
diff --git a/wctdm.c b/wctdm.c
index 1e7540a..2e87897 100644
--- a/wctdm.c
+++ b/wctdm.c
@@ -1032,7 +1032,6 @@ ZAP_IRQ_HANDLER(wctdm_interrupt)
 	int mode;
 
 	ints = inb(wc->ioaddr + WC_INTSTAT);
-	outb(ints, wc->ioaddr + WC_INTSTAT);
 
 	if (!ints)
 #ifdef LINUX26
@@ -1041,6 +1040,8 @@ ZAP_IRQ_HANDLER(wctdm_interrupt)
 		return;
 #endif		
 
+	outb(ints, wc->ioaddr + WC_INTSTAT);
+
 	if (ints & 0x10) {
 		/* Stop DMA, wait for watchdog */
 		printk("TDM PCI Master abort\n");
diff --git a/wctdm24xxp.c b/wctdm24xxp.c
index e4e97f7..72418e4 100644
--- a/wctdm24xxp.c
+++ b/wctdm24xxp.c
@@ -1428,7 +1428,6 @@ ZAP_IRQ_HANDLER(wctdm_interrupt)
 
 	/* Read and clear interrupts */
 	ints = wctdm_getctl(wc, 0x0028);
-	wctdm_setctl(wc, 0x0028, ints);
 
 	if (!ints)
 #ifdef LINUX26
@@ -1436,6 +1435,9 @@ ZAP_IRQ_HANDLER(wctdm_interrupt)
 #else
 		return;
 #endif		
+
+	wctdm_setctl(wc, 0x0028, ints);
+
 	ints &= wc->intmask;
 	if (ints & 0x00000041) {
 		do {
diff --git a/wcte11xp.c b/wcte11xp.c
index 3ac0291..98669a4 100644
--- a/wcte11xp.c
+++ b/wcte11xp.c
@@ -1265,8 +1265,6 @@ ZAP_IRQ_HANDLER(t1xxp_interrupt)
 	int x;
 
 	ints = inb(wc->ioaddr + WC_INTSTAT);
-	outb(ints, wc->ioaddr + WC_INTSTAT);
-
 	if (!ints)
 #ifdef LINUX26
 		return IRQ_NONE;
@@ -1274,6 +1272,8 @@ ZAP_IRQ_HANDLER(t1xxp_interrupt)
 		return;
 #endif		
 
+	outb(ints, wc->ioaddr + WC_INTSTAT);
+
 	if (!wc->intcount) {
 		if (debug) printk("Got interrupt: 0x%04x\n", ints);
 	}
-- 
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