This is because a single DMA request can be transferred using multiple TI
commands, and so a TC equal to zero may not represent the completion of
the SCSI DMA command.

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: <20240112125420.514425-32-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/scsi/esp.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c
index 4d58a49c73..14c6d05253 100644
--- a/hw/scsi/esp.c
+++ b/hw/scsi/esp.c
@@ -543,7 +543,7 @@ static void write_response(ESPState *s)
     esp_raise_irq(s);
 }
 
-static void esp_dma_done(ESPState *s)
+static void esp_dma_ti_check(ESPState *s)
 {
     if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) {
         s->rregs[ESP_RINTR] |= INTR_BS;
@@ -613,7 +613,7 @@ static void do_dma_pdma_cb(ESPState *s)
             return;
         }
 
-        esp_dma_done(s);
+        esp_dma_ti_check(s);
     } else {
         if (s->async_len == 0 && fifo8_num_used(&s->fifo) < 2) {
             /* Defer until the scsi layer has completed */
@@ -622,7 +622,7 @@ static void do_dma_pdma_cb(ESPState *s)
             return;
         }
 
-        esp_dma_done(s);
+        esp_dma_ti_check(s);
 
         /* Copy device data to FIFO */
         len = MIN(s->async_len, esp_get_tc(s));
@@ -708,7 +708,7 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            esp_dma_done(s);
+            esp_dma_ti_check(s);
         } else {
             esp_set_pdma_cb(s, DO_DMA_PDMA_CB);
             esp_raise_drq(s);
@@ -719,7 +719,7 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            esp_dma_done(s);
+            esp_dma_ti_check(s);
         }
     } else {
         if (s->dma_memory_write) {
@@ -736,7 +736,7 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            esp_dma_done(s);
+            esp_dma_ti_check(s);
         } else {
             /* Copy device data to FIFO */
             len = MIN(len, fifo8_num_free(&s->fifo));
@@ -754,7 +754,7 @@ static void esp_do_dma(ESPState *s)
                 return;
             }
 
-            esp_dma_done(s);
+            esp_dma_ti_check(s);
         }
     }
 }
@@ -890,7 +890,7 @@ void esp_command_complete(SCSIRequest *req, size_t resid)
          * this)
          */
         esp_set_tc(s, 0);
-        esp_dma_done(s);
+        esp_dma_ti_check(s);
     } else {
         /*
          * Transfer truncated: raise INTR_BS to indicate early change of
@@ -939,7 +939,7 @@ void esp_transfer_data(SCSIRequest *req, uint32_t len)
 
     if (s->ti_cmd == (CMD_TI | CMD_DMA)) {
         /* When the SCSI layer returns more data, raise deferred INTR_BS */
-        esp_dma_done(s);
+        esp_dma_ti_check(s);
 
         esp_do_dma(s);
     } else if (s->ti_cmd == CMD_TI) {
-- 
2.39.2