[Mesa-stable] [PATCH] i965: perf: ensure reading config IDs from sysfs isn't interrupted

[Lionel Landwerlin]

Fixes: 458468c136e "i965: Expose OA counters via INTEL_performance_query"
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Cc: "18.0" <mesa-stable at lists.freedesktop.org>
---
 src/mesa/drivers/dri/i965/brw_performance_query.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_performance_query.c b/src/mesa/drivers/dri/i965/brw_performance_query.c
index c0bb4442bec..613e61653fe 100644
--- a/src/mesa/drivers/dri/i965/brw_performance_query.c
+++ b/src/mesa/drivers/dri/i965/brw_performance_query.c
@@ -1720,7 +1720,8 @@ read_file_uint64(const char *file, uint64_t *val)
     fd = open(file, 0);
     if (fd < 0)
 	return false;
-    n = read(fd, buf, sizeof (buf) - 1);
+    while ((n = read(fd, buf, sizeof (buf) - 1)) < 0 &&
+           errno == EINTR);
     close(fd);
     if (n < 0)
 	return false;
-- 
2.16.1