From 73f574945f2cac14f9bafa6395e2c4dbb16fcf5d Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sun, 27 Jan 2013 16:02:52 +0000
Subject: [PATCH] sna: Disable all signals in the render threads

X uses them (SIGIO especially) for input handling, and gets rightfully
confused if it finds itself in a different thread.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/sna_threads.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/sna/sna_threads.c b/src/sna/sna_threads.c
index 4a98753f..f77ddbfe 100644
--- a/src/sna/sna_threads.c
+++ b/src/sna/sna_threads.c
@@ -29,6 +29,7 @@
 
 #include <unistd.h>
 #include <pthread.h>
+#include <signal.h>
 
 static int max_threads = -1;
 
@@ -44,6 +45,11 @@ static struct thread {
 static void *__run__(void *arg)
 {
 	struct thread *t = arg;
+	sigset_t signals;
+
+	/* Disable all signals in the slave threads as X uses them for IO */
+	sigfillset(&signals);
+	pthread_sigmask(SIG_BLOCK, &signals, NULL);
 
 	pthread_mutex_lock(&t->mutex);
 	while (1) {