Better to avoid transfer when len = 0

Stephane-D · May 29, 2024 · 552749a · 552749a
1 parent 40afedd
commit 552749a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/dma.c b/src/dma.c
@@ -321,6 +321,9 @@ u16 DMA_getQueueTransferSize()
 
 bool DMA_transfer(TransferMethod tm, u8 location, void* from, u16 to, u16 len, u16 step)
 {
+    // nothing to do (avoid transfering 65536 words when len = 0)
+    if (!len) return TRUE;
+
     switch(tm)
     {
         // default = CPU transfer