stmhal/irq: Add comment about SDIO priority being higher than DMA.

18820471 · Damien George · 22bd2311 · 18820471
Commit 18820471 authored Nov 24, 2015 by Damien George
--- a/stmhal/irq.h
+++ b/stmhal/irq.h
@@ -69,6 +69,7 @@ MP_DECLARE_CONST_FUN_OBJ(pyb_enable_irq_obj);
 #define IRQ_PRI_FLASH           1
 #define IRQ_SUBPRI_FLASH                    1

+// SDIO must be higher priority than DMA for SDIO DMA transfers to work.
 #define IRQ_PRI_SDIO            4
 #define IRQ_SUBPRI_SDIO                     0