[PATCH v2 02/16] esp.c: replace cmdfifo use of esp_fifo_pop_buf() in do_message_phase()

[Mark Cave-Ayland]

The aim is to restrict the esp_fifo_*() functions so that they only operate on
the hardware FIFO. When reading from cmdfifo in do_message_phase() use the
underlying Fifo8 functions directly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/scsi/esp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c
index f8230c74b3..100560244b 100644
--- a/hw/scsi/esp.c
+++ b/hw/scsi/esp.c
@@ -309,6 +309,8 @@ static void do_command_phase(ESPState *s)
 
 static void do_message_phase(ESPState *s)
 {
+    uint32_t n;
+
     if (s->cmdfifo_cdb_offset) {
         uint8_t message = esp_fifo_pop(&s->cmdfifo);
 
@@ -320,7 +322,10 @@ static void do_message_phase(ESPState *s)
     /* Ignore extended messages for now */
     if (s->cmdfifo_cdb_offset) {
         int len = MIN(s->cmdfifo_cdb_offset, fifo8_num_used(&s->cmdfifo));
-        esp_fifo_pop_buf(&s->cmdfifo, NULL, len);
+
+        if (len) {
+            fifo8_pop_buf(&s->cmdfifo, len, &n);
+        }
         s->cmdfifo_cdb_offset = 0;
     }
 }
-- 
2.39.2