From: ppisa <pisa@cmp.felk.cvut.cz>
Date: Tue, 3 Feb 2009 03:06:55 +0000 (+0100)
Subject: Eliminated busy loop in the USB can sources and thread priority increased.
X-Git-Url: http://rtime.felk.cvut.cz/gitweb/lincan.git/commitdiff_plain/cfa9e7afb7fe4e51b86b22be595dfe4c0615fa54?hp=1a157d7de03aaf7887a59fae6fbd62eec854aede

Eliminated busy loop in the USB can sources and thread priority increased.

Signed-off-by: ppisa <pisa@cmp.felk.cvut.cz>
---

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);