[PATCH net v3 11/14] net: pse-pd: free the notification kfifo when registration fails

[Carlo Szelinsky <github@szelinsky.de>]

When pse_controller_register() fails after it allocated the
notification kfifo, it returns without freeing it.

Free the kfifo on every error path.

Found by code inspection and AI review.

Fixes: ffef61d6d273 ("net: pse-pd: Add support for budget evaluation strategies")
Signed-off-by: Carlo Szelinsky <github@szelinsky.de>
---
 drivers/net/pse-pd/pse_core.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/net/pse-pd/pse_core.c b/drivers/net/pse-pd/pse_core.c
index eccbdb3acbee..137570fe0da2 100644
--- a/drivers/net/pse-pd/pse_core.c
+++ b/drivers/net/pse-pd/pse_core.c
@@ -1121,24 +1121,25 @@ int pse_controller_register(struct pse_controller_dev *pcdev)
 	    !pcdev->ops->pi_get_pw_status) {
 		dev_err(pcdev->dev,
 			"Mandatory status report callbacks are missing");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto free_kfifo;
 	}
 
 	ret = of_load_pse_pis(pcdev);
 	if (ret)
-		return ret;
+		goto free_kfifo;
 
 	/* The PI regulator ops use pcdev->pi until devres unregisters the
 	 * regulators, so free it from devres too, after them.
 	 */
 	ret = devm_add_action_or_reset(pcdev->dev, devm_pse_release_pis, pcdev);
 	if (ret)
-		return ret;
+		goto free_kfifo;
 
 	if (pcdev->ops->setup_pi_matrix) {
 		ret = pcdev->ops->setup_pi_matrix(pcdev);
 		if (ret)
-			return ret;
+			goto free_kfifo;
 	}
 
 	/* Each regulator name len is pcdev dev name + 7 char +
@@ -1155,26 +1156,33 @@ int pse_controller_register(struct pse_controller_dev *pcdev)
 			continue;
 
 		reg_name = devm_kzalloc(pcdev->dev, reg_name_len, GFP_KERNEL);
-		if (!reg_name)
-			return -ENOMEM;
+		if (!reg_name) {
+			ret = -ENOMEM;
+			goto free_kfifo;
+		}
 
 		snprintf(reg_name, reg_name_len, "pse-%s_pi%d",
 			 dev_name(pcdev->dev), i);
 
 		ret = devm_pse_pi_regulator_register(pcdev, reg_name, i);
 		if (ret)
-			return ret;
+			goto free_kfifo;
 	}
 
 	ret = pse_register_pw_ds(pcdev);
 	if (ret)
-		return ret;
+		goto free_kfifo;
 
 	mutex_lock(&pse_list_mutex);
 	list_add(&pcdev->list, &pse_controller_list);
 	mutex_unlock(&pse_list_mutex);
 
 	return 0;
+
+free_kfifo:
+	cancel_work_sync(&pcdev->ntf_work);
+	kfifo_free(&pcdev->ntf_fifo);
+	return ret;
 }
 EXPORT_SYMBOL_GPL(pse_controller_register);
 
-- 
2.43.0