esp.c: update condition for esp_dma_done() in esp_do_dma() to device …

…path

Ensure that esp_dma_done() is only called when TC is zero, which is currently
always the case for DMA transfers.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Helge Deller <deller@gmx.de>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20240112125420.514425-22-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

hw/scsi/esp.c

@@ -725,9 +725,11 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            /* Partially filled a scsi buffer. Complete immediately.  */
-            esp_dma_done(s);
-            esp_lower_drq(s);
+            if (esp_get_tc(s) == 0) {
+                /* Partially filled a scsi buffer. Complete immediately.  */
+                esp_dma_done(s);
+                esp_lower_drq(s);
+            }
         } else {
             esp_set_pdma_cb(s, DO_DMA_PDMA_CB);
             esp_raise_drq(s);