Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches

- Fix hang after request padding error (Windows + 512-on-4k emulation)

# gpg: Signature made Tue 03 Aug 2021 15:40:10 BST
# gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg:                issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  block: Fix in_flight leak in request padding error path

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

block/io.c

@@ -1841,7 +1841,7 @@ int coroutine_fn bdrv_co_preadv_part(BdrvChild *child,
     ret = bdrv_pad_request(bs, &qiov, &qiov_offset, &offset, &bytes, &pad,
                            NULL);
     if (ret < 0) {
-        return ret;
+        goto fail;
     }
 
     tracked_request_begin(&req, bs, offset, bytes, BDRV_TRACKED_READ);
@@ -1849,10 +1849,11 @@ int coroutine_fn bdrv_co_preadv_part(BdrvChild *child,
                               bs->bl.request_alignment,
                               qiov, qiov_offset, flags);
     tracked_request_end(&req);
-    bdrv_dec_in_flight(bs);
-
     bdrv_padding_destroy(&pad);
 
+fail:
+    bdrv_dec_in_flight(bs);
+
     return ret;
 }