nvme-hwmon: Return error code when registration fails

The hwmon pointer wont be NULL if the registration fails. Though the
exit code path will assign it to ctrl->hwmon_device. Later
nvme_hwmon_exit() will try to free the invalid pointer. Avoid this by
returning the error code from hwmon_device_register_with_info().

Fixes: ed7770f66286 ("nvme/hwmon: rework to avoid devm allocation")
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/hwmon.c b/drivers/nvme/host/hwmon.c
index 8f9e969..0a586d7 100644 (file)
--- a/drivers/nvme/host/hwmon.c
+++ b/drivers/nvme/host/hwmon.c
@@ -248,6 +248,7 @@ int nvme_hwmon_init(struct nvme_ctrl *ctrl)
        if (IS_ERR(hwmon)) {
                dev_warn(dev, "Failed to instantiate hwmon device\n");
                kfree(data);
+               return PTR_ERR(hwmon);
        }
        ctrl->hwmon_device = hwmon;
        return 0;