gnrc/sock: recv avoid spinning xtimer

RIOT-OS · Sep 9, 2021 · be28c53 · be28c53
1 parent 45521e7
commit be28c53
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/sys/net/gnrc/sock/gnrc_sock.c b/sys/net/gnrc/sock/gnrc_sock.c
@@ -117,6 +117,12 @@ ssize_t gnrc_sock_recv(gnrc_sock_reg_t *reg, gnrc_pktsnip_t **pkt_out,
 #ifdef MODULE_XTIMER
     xtimer_t timeout_timer;
 
+    /* xtimer_spin would make this never receive anything.
+     * Avoid that by setting the minimal not spinning timeout. */
+    if (timeout < XTIMER_BACKOFF && timeout > 0) {
+        timeout = XTIMER_BACKOFF;
+    }
+
     if ((timeout != SOCK_NO_TIMEOUT) && (timeout != 0)) {
         timeout_timer.callback = _callback_put;
         timeout_timer.arg = reg;