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: ec420cdcfab4 ("nvme/hwmon: rework to avoid devm allocation")
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <redacted>
---

This patch is against linux-block/for-next.

  drivers/nvme/host/hwmon.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/hwmon.c b/drivers/nvme/host/hwmon.c
index 8f9e96986780..0a586d712920 100644
--- 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;