From: Adam Sutton <dev@adamsutton.me.uk>
Date: Thu, 22 Jan 2015 15:12:25 +0000 (+0000)
Subject: linuxdvb: appears some tuners are not supporting FE_GET_EVENT
X-Git-Tag: v4.1~438
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=dcdef424fc5296b8083b4c7f00544a300916d30f;p=thirdparty%2Ftvheadend.git

linuxdvb: appears some tuners are not supporting FE_GET_EVENT

This results in a terminal lockup as the ioctl() will loop indefinitely,
testing for != -1 was always a bad idea!
---

diff --git a/src/input/mpegts/linuxdvb/linuxdvb_frontend.c b/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
index 286534ca0..84a83ec09 100644
--- a/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
+++ b/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
@@ -1328,7 +1328,7 @@ linuxdvb_frontend_tune0
 
   /* discard stale events */
   while (1) {
-    if (ioctl(lfe->lfe_fe_fd, FE_GET_EVENT, &ev) == -1)
+    if (ioctl(lfe->lfe_fe_fd, FE_GET_EVENT, &ev) < 0)
       break;
   }