net: lwip: call sys_check_timeouts and schedule on rx

Call schedule() in net_lwip_rx() to service U-Boot tasks and
actions during packet rx.

As a cleanup also move sys_check_timeouts() here and remove it from the
functions that call net_lwip_rx().

This resolves the issue of an active watchdog resetting the board on
long network activities.

Suggested-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>

net/lwip/dhcp.c

@@ -58,7 +58,6 @@ static int dhcp_loop(struct udevice *udev)
 	/* Wait for DHCP to complete */
 	do {
 		net_lwip_rx(udev, netif);
-		sys_check_timeouts();
 		bound = dhcp_supplied_address(netif);
 		if (bound)
 			break;

net/lwip/dns.c

@@ -92,7 +92,6 @@ static int dns_loop(struct udevice *udev, const char *name, const char *var)
 			net_lwip_rx(udev, netif);
 			if (dns_cb_arg.done)
 				break;
-			sys_check_timeouts();
 			if (ctrlc()) {
 				printf("\nAbort\n");
 				break;

net/lwip/net-lwip.c

@@ -14,8 +14,10 @@
 #include <lwip/etharp.h>
 #include <lwip/init.h>
 #include <lwip/prot/etharp.h>
+#include <lwip/timeouts.h>
 #include <net.h>
 #include <timer.h>
+#include <u-boot/schedule.h>
 
 /* xx:xx:xx:xx:xx:xx\0 */
 #define MAC_ADDR_STRLEN 18
@@ -285,6 +287,11 @@ int net_lwip_rx(struct udevice *udev, struct netif *netif)
 	int len;
 	int i;
 
+	/* lwIP timers */
+	sys_check_timeouts();
+	/* Other tasks and actions */
+	schedule();
+
 	if (!eth_is_active(udev))
 		return -EINVAL;
 

net/lwip/ping.c

@@ -136,7 +136,6 @@ static int ping_loop(struct udevice *udev, const ip_addr_t *addr)
 	ping_send(&ctx);
 
 	do {
-		sys_check_timeouts();
 		net_lwip_rx(udev, netif);
 		if (ctx.alive)
 			break;

net/lwip/tftp.c

@@ -201,7 +201,6 @@ static int tftp_loop(struct udevice *udev, ulong addr, char *fname,
 	sys_timeout(NO_RSP_TIMEOUT_MS, no_response, &ctx);
 	while (!ctx.done) {
 		net_lwip_rx(udev, netif);
-		sys_check_timeouts();
 		if (ctrlc()) {
 			printf("\nAbort\n");
 			ctx.done = ABORTED;

net/lwip/wget.c

@@ -526,7 +526,6 @@ int wget_do_request(ulong dst_addr, char *uri)
 
 	while (!ctx.done) {
 		net_lwip_rx(udev, netif);
-		sys_check_timeouts();
 		if (ctrlc())
 			break;
 	}