should not break if poll timeout (#19578)

old-commit-hash: 37826c0032

selfdrive/camerad/cameras/camera_qcom.cc

@@ -2148,7 +2148,7 @@ void cameras_run(MultiCameraState *s) {
     fds[1].events = POLLPRI;
 
     int ret = poll(fds, ARRAYSIZE(fds), 1000);
-    if (ret <= 0) {
+    if (ret < 0) {
       if (errno == EINTR || errno == EAGAIN) continue;
       LOGE("poll failed (%d - %d)", ret, errno);
       break;

selfdrive/camerad/cameras/camera_qcom2.cc

@@ -1167,7 +1167,7 @@ void cameras_run(MultiCameraState *s) {
     fds[0].events = POLLPRI;
 
     int ret = poll(fds, ARRAYSIZE(fds), 1000);
-    if (ret <= 0) {
+    if (ret < 0) {
       if (errno == EINTR || errno == EAGAIN) continue;
       LOGE("poll failed (%d - %d)", ret, errno);
       break;