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igt/drm_read: Clear O_NONBLOCK between tests

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Ensure that O_NONBLOCK isn't accidentally set when we want a nonblocking
file descroptor.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2015-11-25 14:19:15 +00:00
parent 32329b2e7d
commit e10ba6b51c
1 changed files with 9 additions and 8 deletions
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17
tests/drm_read.c
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@ -80,20 +80,21 @@ static void wait_for_event(int fd)
static int setup(int in, int nonblock)
{
int fd;
int ret = -1;
alarm(0);
fd = dup(in);
if (nonblock) {
int ret = -1;
if (fd != -1)
ret = fcntl(fd, F_GETFL);
if (ret != -1) {
if (fd != -1)
ret = fcntl(fd, F_GETFL);
if (ret != -1) {
if (nonblock)
ret |= O_NONBLOCK;
ret = fcntl(fd, F_SETFL, ret);
}
igt_require(ret != -1);
else
ret &= ~O_NONBLOCK;
ret = fcntl(fd, F_SETFL, ret);
}
igt_require(ret != -1);
assert_empty(fd);
return fd;