[v6,6/9] scsi: move unmap error checking to the complete callback

Commit Message

Anton Nefedov Nov. 30, 2018, 2:47 p.m. UTC

This will help to account the operation in the following commit.

The difference is that we don't call scsi_disk_req_check_error() before
the 1st discard iteration anymore. That function also checks if
the request is cancelled, however it shouldn't get canceled until it
yields in blk_aio() functions anyway.
Same approach is already used for emulate_write_same.

Signed-off-by: Anton Nefedov <[e-mail]>
Reviewed-by: Vladimir Sementsov-Ogievskiy <[e-mail]>
Reviewed-by: Alberto Garcia <[e-mail]>
---
 hw/scsi/scsi-disk.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

Patch

diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index b1133e6293..daf37d117c 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -1606,9 +1606,6 @@  static void scsi_unmap_complete_noio(UnmapCBData *data, int ret)
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
 
     assert(r->req.aiocb == NULL);
-    if (scsi_disk_req_check_error(r, ret, false)) {
-        goto done;
-    }
 
     if (data->count > 0) {
         r->sector = ldq_be_p(&data->inbuf[0]);
@@ -1644,7 +1641,12 @@  static void scsi_unmap_complete(void *opaque, int ret)
     r->req.aiocb = NULL;
 
     aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
-    scsi_unmap_complete_noio(data, ret);
+    if (scsi_disk_req_check_error(r, ret, false)) {
+        scsi_req_unref(&r->req);
+        g_free(data);
+    } else {
+        scsi_unmap_complete_noio(data, ret);
+    }
     aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
 }