From cfa9e7afb7fe4e51b86b22be595dfe4c0615fa54 Mon Sep 17 00:00:00 2001
From: ppisa <pisa@cmp.felk.cvut.cz>
Date: Tue, 3 Feb 2009 04:06:55 +0100
Subject: [PATCH] Eliminated busy loop in the USB can sources and thread
 priority increased.

Signed-off-by: ppisa <pisa@cmp.felk.cvut.cz>
---
 lincan/src/usbcan.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lincan/src/usbcan.c b/lincan/src/usbcan.c
index 01d2f90..429167c 100644
--- a/lincan/src/usbcan.c
+++ b/lincan/src/usbcan.c
@@ -1213,6 +1213,12 @@ int usbcan_kthread(void *data)
 	INIT_LIST_HEAD(&dev->tx_pend_list);
 	INIT_LIST_HEAD(&dev->tx_ready_list);
 
+	if (1) {
+		struct sched_param param = { .sched_priority = 1 };
+		sched_setscheduler(current, SCHED_FIFO, &param);
+	}
+
+
 	/* Prepare receive urbs  */
 	for (i=0;i<USBCAN_TOT_RX_URBS;i++){
 		struct usbcan_message *m;
@@ -1315,6 +1321,10 @@ int usbcan_kthread(void *data)
 			break;
 		}
 
+		clear_bit(USBCAN_DATA_OK,&dev->flags);
+
+		mb();
+
 		while(!list_empty(&dev->rx_ready_list)) {
 			struct usbcan_message *m;
 			m = list_first_entry(&dev->rx_ready_list, typeof(*m), list_node);
-- 
2.39.2