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    Subject[PATCH 5.1 122/371] nvme-pci: set the errno on ctrl state change error
    Date
    [ Upstream commit e71afda49335620e3d9adf56015676db33a3bd86 ]

    This patch removes the confusing assignment of the variable result at
    the time of declaration and sets the value in error cases next to the
    places where the actual error is happening.

    Here we also set the result value to -ENODEV when we fail at the final
    ctrl state transition in nvme_reset_work(). Without this assignment
    result will hold 0 from nvme_setup_io_queue() and on failure 0 will be
    passed to he nvme_remove_dead_ctrl() from final state transition.

    Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
    Signed-off-by: Christoph Hellwig <hch@lst.de>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/nvme/host/pci.c | 7 +++++--
    1 file changed, 5 insertions(+), 2 deletions(-)

    diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
    index 21a51a0ff4d7..9c956ff5344d 100644
    --- a/drivers/nvme/host/pci.c
    +++ b/drivers/nvme/host/pci.c
    @@ -2504,11 +2504,13 @@ static void nvme_reset_work(struct work_struct *work)
    struct nvme_dev *dev =
    container_of(work, struct nvme_dev, ctrl.reset_work);
    bool was_suspend = !!(dev->ctrl.ctrl_config & NVME_CC_SHN_NORMAL);
    - int result = -ENODEV;
    + int result;
    enum nvme_ctrl_state new_state = NVME_CTRL_LIVE;

    - if (WARN_ON(dev->ctrl.state != NVME_CTRL_RESETTING))
    + if (WARN_ON(dev->ctrl.state != NVME_CTRL_RESETTING)) {
    + result = -ENODEV;
    goto out;
    + }

    /*
    * If we're called to reset a live controller first shut it down before
    @@ -2606,6 +2608,7 @@ static void nvme_reset_work(struct work_struct *work)
    if (!nvme_change_ctrl_state(&dev->ctrl, new_state)) {
    dev_warn(dev->ctrl.device,
    "failed to mark controller state %d\n", new_state);
    + result = -ENODEV;
    goto out;
    }

    --
    2.20.1


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