childinfo_t is a union that contains both signed (error) and unsigned
(threadid) members. Thus a large threadid could appear as a negative error
value, which will cause unexpected failures.

childinfo_t should be changed to a struct, but it could potentially affect the
performance. So we keep it as a union but only check error against -1. There is
still a chance of false alarm but it's small.

Upstream-Status: Pending

Signed-off-by: Song.Li <Song.Li@windriver.com>
Signed-off-by: Jesse Zhang <sen.zhang@windriver.com>
---
 src/hackbench/hackbench.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/hackbench/hackbench.c b/src/hackbench/hackbench.c
index 8baeb23..dc0de8f 100644
--- a/src/hackbench/hackbench.c
+++ b/src/hackbench/hackbench.c
@@ -317,7 +317,7 @@ static unsigned int group(childinfo_t *child,
 		ctx->wakefd = wakefd;
 
 		child[tab_offset+i] = create_worker(ctx, (void *)(void *)receiver);
-		if( child[tab_offset+i].error < 0 ) {
+		if( child[tab_offset+i].error == -1 ) {
 			return (i > 0 ? i-1 : 0);
 		}
 		snd_ctx->out_fds[i] = fds[1];
@@ -332,7 +332,7 @@ static unsigned int group(childinfo_t *child,
 		snd_ctx->num_fds = num_fds;
 
 		child[tab_offset+num_fds+i] = create_worker(snd_ctx, (void *)(void *)sender);
-		if( child[tab_offset+num_fds+i].error < 0 ) {
+		if( child[tab_offset+num_fds+i].error == -1 ) {
 			return (num_fds+i)-1;
 		}
 	}
-- 
1.7.9.5