From: Michal Sojka <sojkam1@fel.cvut.cz>
Date: Fri, 3 Dec 2010 22:33:32 +0000 (+0100)
Subject: Do not call poll with negative timeout
X-Git-Tag: fix-allnoconfig~265
X-Git-Url: http://rtime.felk.cvut.cz/gitweb/can-benchmark.git/commitdiff_plain/cf9bd660b3c10cff6e81af6fb4e42d3569229514

Do not call poll with negative timeout
---

diff --git a/latester/latester.c b/latester/latester.c
index d178e1e..c980f24 100644
--- a/latester/latester.c
+++ b/latester/latester.c
@@ -74,6 +74,7 @@ struct options opt = {
 
 struct {
 	unsigned enobufs;
+	unsigned overrun;
 } stats;
 
 int num_interfaces = 0;
@@ -401,7 +402,10 @@ static inline void get_next_timeout(struct timespec *timeout)
 			last.tv_nsec -= 1000000000;
 			last.tv_sec++;
 		}
-		timespec_subtract(timeout, &last, &now);
+		if (timespec_subtract(timeout, &last, &now) /* is negative */) {
+			stats.overrun++;
+			memset(timeout, 0, sizeof(*timeout));
+		}
 	} else if (opt.timeout_ms != 0) {
 		timeout->tv_sec = opt.timeout_ms/1000;
 		timeout->tv_nsec = (opt.timeout_ms%1000)*1000000;
@@ -751,5 +755,10 @@ int main(int argc, const char *argv[])
 	if (opt.file)
 		fclose(opt.file);
 
+	if (stats.overrun)
+		printf("overrun=%d\n", stats.overrun);
+	if (stats.enobufs)
+		printf("enobufs=%d\n", stats.enobufs);
+
 	return 0;
 }