From: Hanno Böck <hanno@gentoo.org>
Date: Thu, 21 May 2020 16:51:06 +0000 (+0200)
Subject: Properly check mmap return value
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=be71e2fd08b364f331a7e44d34f67954f0aeebe3;p=mesa.git

Properly check mmap return value

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5150>
---

diff --git a/src/freedreno/perfcntrs/fdperf.c b/src/freedreno/perfcntrs/fdperf.c
index cc5e90c39d9..976f6ee77bb 100644
--- a/src/freedreno/perfcntrs/fdperf.c
+++ b/src/freedreno/perfcntrs/fdperf.c
@@ -332,7 +332,7 @@ find_device(void)
 		err(1, "could not open /dev/mem");
 
 	dev.io = mmap(0, dev.size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, dev.base);
-	if (!dev.io) {
+	if (dev.io == MAP_FAILED) {
 		close(fd);
 		err(1, "could not map device");
 	}