ahci: factor ncq_finish out of ncq_cb

When we add werror=stop or rerror=stop support to NCQ,
we'll want to take a codepath where we don't actually
complete the command, so factor that out into a new routine.
Signed-off-by: NJohn Snow <jsnow@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Message-id: 1435767578-32743-6-git-send-email-jsnow@redhat.com

hw/ide/ahci.c

@@ -933,6 +933,23 @@ static void ncq_err(NCQTransferState *ncq_tfs)
     ncq_tfs->drive->port_regs.scr_err |= (1 << ncq_tfs->tag);
 }
 
+static void ncq_finish(NCQTransferState *ncq_tfs)
+{
+    /* Clear bit for this tag in SActive */
+    ncq_tfs->drive->port_regs.scr_act &= ~(1 << ncq_tfs->tag);
+
+    ahci_write_fis_sdb(ncq_tfs->drive->hba, ncq_tfs->drive->port_no,
+                       (1 << ncq_tfs->tag));
+
+    DPRINTF(ncq_tfs->drive->port_no, "NCQ transfer tag %d finished\n",
+            ncq_tfs->tag);
+
+    block_acct_done(blk_get_stats(ncq_tfs->drive->port.ifs[0].blk),
+                    &ncq_tfs->acct);
+    qemu_sglist_destroy(&ncq_tfs->sglist);
+    ncq_tfs->used = 0;
+}
+
 static void ncq_cb(void *opaque, int ret)
 {
     NCQTransferState *ncq_tfs = (NCQTransferState *)opaque;
@@ -941,8 +958,6 @@ static void ncq_cb(void *opaque, int ret)
     if (ret == -ECANCELED) {
         return;
     }
-    /* Clear bit for this tag in SActive */
-    ncq_tfs->drive->port_regs.scr_act &= ~(1 << ncq_tfs->tag);
 
     if (ret < 0) {
         ncq_err(ncq_tfs);
@@ -950,16 +965,7 @@ static void ncq_cb(void *opaque, int ret)
         ide_state->status = READY_STAT | SEEK_STAT;
     }
 
-    ahci_write_fis_sdb(ncq_tfs->drive->hba, ncq_tfs->drive->port_no,
-                       (1 << ncq_tfs->tag));
-
-    DPRINTF(ncq_tfs->drive->port_no, "NCQ transfer tag %d finished\n",
-            ncq_tfs->tag);
-
-    block_acct_done(blk_get_stats(ncq_tfs->drive->port.ifs[0].blk),
-                    &ncq_tfs->acct);
-    qemu_sglist_destroy(&ncq_tfs->sglist);
-    ncq_tfs->used = 0;
+    ncq_finish(ncq_tfs);
 }
 
 static int is_ncq(uint8_t ata_cmd)