boards/: Within the OS, nxisg_usleep() should be used instead of usleep(). usleep() is a cancellation point and sets the errno value. Neither of which should be done inside the OS.

boards/arm/stm32f0l0g0/b-l072z-lrwan1/src/stm32_sx127x.c

@@ -46,8 +46,9 @@
 #include <debug.h>
 
 #include <nuttx/board.h>
-#include <arch/board/board.h>
+#include <nuttx/signal.h>
 #include <nuttx/wireless/lpwan/sx127x.h>
+#include <arch/board/board.h>
 
 #include "stm32_gpio.h"
 #include "stm32_exti.h"
@@ -126,7 +127,7 @@ static void sx127x_chip_reset(void)
 
   /* Wait 1 ms */
 
-  usleep(1000);
+  nxsig_usleep(1000);
 
   /* Configure reset as input */
 
@@ -134,7 +135,7 @@ static void sx127x_chip_reset(void)
 
   /* Wait 10 ms */
 
-  usleep(10000);
+  nxsig_usleep(10000);
 }
 
 /****************************************************************************