This helps simplify the existing implementation.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/scsi/esp.c | 39 +++++++++++----------------------------
 1 file changed, 11 insertions(+), 28 deletions(-)

diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c
index c6151d306e..4d58a49c73 100644
--- a/hw/scsi/esp.c
+++ b/hw/scsi/esp.c
@@ -545,8 +545,11 @@ static void write_response(ESPState *s)
 
 static void esp_dma_done(ESPState *s)
 {
-    s->rregs[ESP_RINTR] |= INTR_BS;
-    esp_raise_irq(s);
+    if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) {
+        s->rregs[ESP_RINTR] |= INTR_BS;
+        esp_raise_irq(s);
+        esp_lower_drq(s);
+    }
 }
 
 static void do_dma_pdma_cb(ESPState *s)
@@ -610,12 +613,7 @@ static void do_dma_pdma_cb(ESPState *s)
             return;
         }
 
-        if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) {
-            esp_lower_drq(s);
-            esp_dma_done(s);
-        }
-
-        return;
+        esp_dma_done(s);
     } else {
         if (s->async_len == 0 && fifo8_num_used(&s->fifo) < 2) {
             /* Defer until the scsi layer has completed */
@@ -624,10 +622,7 @@ static void do_dma_pdma_cb(ESPState *s)
             return;
         }
 
-        if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) {
-            esp_lower_drq(s);
-            esp_dma_done(s);
-        }
+        esp_dma_done(s);
 
         /* Copy device data to FIFO */
         len = MIN(s->async_len, esp_get_tc(s));
@@ -713,10 +708,7 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) {
-                esp_dma_done(s);
-                esp_lower_drq(s);
-            }
+            esp_dma_done(s);
         } else {
             esp_set_pdma_cb(s, DO_DMA_PDMA_CB);
             esp_raise_drq(s);
@@ -727,10 +719,7 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) {
-                esp_dma_done(s);
-                esp_lower_drq(s);
-            }
+            esp_dma_done(s);
         }
     } else {
         if (s->dma_memory_write) {
@@ -747,10 +736,7 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) {
-                esp_dma_done(s);
-                esp_lower_drq(s);
-            }
+            esp_dma_done(s);
         } else {
             /* Copy device data to FIFO */
             len = MIN(len, fifo8_num_free(&s->fifo));
@@ -768,10 +754,7 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) {
-                esp_lower_drq(s);
-                esp_dma_done(s);
-            }
+            esp_dma_done(s);
         }
     }
 }
-- 
2.39.2