[KGDB PATCH][6/7] KGDBOE fixes

[Tom Rini <trini@kernel.crashing.org>]

Hello.  The following is a couple of small but important cleanups to kgdboe.
- memset out_buf in case we don't have it full when we flush.
- In rx_hook, if netpoll_trap() is set, clear it.  If kgdb_isn't connected,
  schedule a breakpoint, and never call breakpoint() directly.
- In kgdb_serial->hook, set netpoll_trap(1).  kgdb_serial->hook must be
  called prior to using a 'serial' port, so this is where we should stick
  this.
- Backout unneeded changes to other files.

--- linux-2.6.3/drivers/net/kgdb_eth.c.orig	2004-02-27 13:27:53.778658691 -0700
+++ linux-2.6.3/drivers/net/kgdb_eth.c	2004-02-27 13:32:07.920255062 -0700
@@ -18,6 +18,7 @@
  * Refactored for netpoll API by Matt Mackall <mpm@selenic.com>
  *
  * Some cleanups by Pavel Machek <pavel@suse.cz>
+ * Further cleanups by Tom Rini <trini@mvista.com>
  */
 
 #include <linux/module.h>
@@ -60,7 +61,6 @@
 static atomic_t in_count;
 int kgdboe = 0;			/* Default to tty mode */
 
-extern void breakpoint(void);
 static void rx_hook(struct netpoll *np, int port, char *msg, int len);
 
 static struct netpoll np = {
@@ -89,6 +89,7 @@
 {
 	if (out_count && np.dev) {
 		netpoll_send_udp(&np, out_buf, out_count);
+		memset(out_buf, 0, sizeof(out_buf));
 		out_count = 0;
 	}
 }
@@ -107,12 +108,15 @@
 	np->remote_port = port;

+	/* Do we need to clear the trap? */
+	if (netpoll_trap())
+		netpoll_set_trap(0);
 	/* Is this gdb trying to attach? */
-	if (!netpoll_trap() && len == 8 && !strncmp(msg, "$Hc-1#09", 8))
-		breakpoint();
+	if (kgdb_connected) {
+		kgdb_schedule_breakpoint();
 
 	for (i = 0; i < len; i++) {
 		if (msg[i] == 3)
-			breakpoint();
+			kgdb_schedule_breakpoint();
 
 		if (atomic_read(&in_count) >= IN_BUF_SIZE) {
 			/* buffer overflow, clear it */
@@ -138,6 +141,9 @@
 	/* Un-initalized, don't go further. */
 	if (kgdboe != 1)
 		return 1;
+
+	netpoll_set_trap(1);
+
 	return 0;
 }
 
--- linux-2.6.3/net/core/skbuff.c.orig	2004-02-27 13:30:21.107968572 -0700
+++ linux-2.6.3/net/core/skbuff.c	2004-02-27 13:30:44.279825113 -0700
@@ -55,7 +55,6 @@
 #include <linux/rtnetlink.h>
 #include <linux/init.h>
 #include <linux/highmem.h>
-#include <linux/debugger.h>
 
 #include <net/protocol.h>
 #include <net/dst.h>
--- linux-2.6.3/net/core/dev.c.orig	2004-02-27 13:30:27.687508165 -0700
+++ linux-2.6.3/net/core/dev.c	2004-02-27 13:30:44.261829108 -0700
@@ -1547,6 +1547,7 @@
 }
 #endif
 
+
 /**
  *	netif_rx	-	post buffer to the network code
  *	@skb: buffer to post

-- 
Tom Rini
http://gate.crashing.org/~trini/