nvme: flush reset_work before safely continuing with delete operation

Prevent racing controller reset and delete flows. reset_work must not
ever self-requeue so flushing it suffices.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 4fa748c..003314e 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -102,6 +102,7 @@ static void nvme_delete_ctrl_work(struct work_struct *work)
        struct nvme_ctrl *ctrl =
                container_of(work, struct nvme_ctrl, delete_work);
 
+       flush_work(&ctrl->reset_work);
        nvme_stop_ctrl(ctrl);
        nvme_remove_namespaces(ctrl);
        ctrl->ops->delete_ctrl(ctrl);

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index e447b53..6a025a8 100644 (file)
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2638,7 +2638,6 @@ nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl)
 {
        struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
 
-       cancel_work_sync(&ctrl->ctrl.reset_work);
        cancel_delayed_work_sync(&ctrl->connect_work);
        /*
         * kill the association on the link side.  this will block