[PATCH 09/12] hw/nvme: improve cancellation handling in zone reset

[Klaus Jensen]

From: Klaus Jensen <k.jensen@samsung.com>

If the zone reset operation is cancelled but the block unmap operation
completes normally, the callback will continue resetting the next zone
since it neglects to check iocb->ret which will have been set to
-ECANCELED. Make sure that this is checked and bail out if an error is
present.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/nvme/ctrl.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index 1acf88d9e8c7..9add74753fd8 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -3760,14 +3760,8 @@ static void nvme_zone_reset_epilogue_cb(void *opaque, 
int ret)
     int64_t moff;
     int count;
 
-    if (ret < 0) {
-        nvme_zone_reset_cb(iocb, ret);
-        return;
-    }
-
-    if (!ns->lbaf.ms) {
-        nvme_zone_reset_cb(iocb, 0);
-        return;
+    if (ret < 0 || iocb->ret < 0 || !ns->lbaf.ms) {
+        goto out;
     }
 
     moff = nvme_moff(ns, iocb->zone->d.zslba);
@@ -3777,6 +3771,9 @@ static void nvme_zone_reset_epilogue_cb(void *opaque, int 
ret)
                                         BDRV_REQ_MAY_UNMAP,
                                         nvme_zone_reset_cb, iocb);
     return;
+
+out:
+    nvme_zone_reset_cb(iocb, ret);
 }
 
 static void nvme_zone_reset_cb(void *opaque, int ret)
@@ -3788,6 +3785,8 @@ static void nvme_zone_reset_cb(void *opaque, int ret)
     if (ret < 0) {
         iocb->ret = ret;
         goto done;
+    } else if (iocb->ret < 0) {
+        goto done;
     }
 
     if (iocb->zone) {
-- 
2.36.1