[PATCH 1/2] hw/block/nvme: consider metadata read aio return value in compare

[Gollu Appalanaidu]

Currently in compare command metadata aio read blk_aio_preadv return
value ignored, consider it and complete the block accounting.

Signed-off-by: Gollu Appalanaidu <anaidu.gollu@samsung.com>
---
 hw/block/nvme.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 624a1431d0..c2727540f1 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -2369,10 +2369,19 @@ static void nvme_compare_mdata_cb(void *opaque, int ret)
     uint32_t reftag = le32_to_cpu(rw->reftag);
     struct nvme_compare_ctx *ctx = req->opaque;
     g_autofree uint8_t *buf = NULL;
+    BlockBackend *blk = ns->blkconf.blk;
+    BlockAcctCookie *acct = &req->acct;
+    BlockAcctStats *stats = blk_get_stats(blk);
     uint16_t status = NVME_SUCCESS;
 
     trace_pci_nvme_compare_mdata_cb(nvme_cid(req));
 
+    if (ret) {
+        block_acct_failed(stats, acct);
+        nvme_aio_err(req, ret);
+        goto out;
+    }
+
     buf = g_malloc(ctx->mdata.iov.size);
 
     status = nvme_bounce_mdata(n, buf, ctx->mdata.iov.size,
@@ -2421,6 +2430,8 @@ static void nvme_compare_mdata_cb(void *opaque, int ret)
         goto out;
     }
 
+    block_acct_done(stats, acct);
+
 out:
     qemu_iovec_destroy(&ctx->data.iov);
     g_free(ctx->data.bounce);
-- 
2.17.1