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authorNamhyung Kim <namhyung@kernel.org>2014-04-24 22:27:32 +0900
committerJiri Olsa <jolsa@kernel.org>2014-04-29 14:26:30 +0200
commite148c76083dc06ce618d768c0bee0a0edda96a54 (patch)
tree6c044eb662edb540d246a8417d7c2133cc98233b
parent201131998fbf074b03679afedcc29948e63331ef (diff)
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perf tools: Handle EINTR error for readn/writen
Those readn/writen functions are to ensure read/write does I/O for a given size exactly. But ion() - its implementation - does not handle in case it returns prematurely due to a signal. As it's not an error itself so just retry the operation. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1398346054-3322-1-git-send-email-namhyung@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
-rw-r--r--tools/perf/util/util.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 9f66549562bd..7fff6be07f07 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -166,6 +166,8 @@ static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
ssize_t ret = is_read ? read(fd, buf, left) :
write(fd, buf, left);
+ if (ret < 0 && errno == EINTR)
+ continue;
if (ret <= 0)
return ret;