[PATCH v3 2/4] soc: qcom: ice: Return proper error codes from devm_of_qcom_ice_get() instead of NULL

[Manivannan Sadhasivam via B4 Relay <devnull+manivannan.sadhasivam.oss.qualcomm.com@kernel.org>]

From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>

devm_of_qcom_ice_get() currently returns NULL if ICE SCM is not available or
"qcom,ice" property is not found in DT. But this confuses the clients since
NULL doesn't convey the reason for failure. So return proper error codes
instead of NULL.

Reported-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
---
 drivers/soc/qcom/ice.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/soc/qcom/ice.c b/drivers/soc/qcom/ice.c
index 3c3c189e24f9..1212b2481a04 100644
--- a/drivers/soc/qcom/ice.c
+++ b/drivers/soc/qcom/ice.c
@@ -562,7 +562,7 @@ static struct qcom_ice *qcom_ice_create(struct device *dev,
 
 	if (!qcom_scm_ice_available()) {
 		dev_warn(dev, "ICE SCM interface not found\n");
-		return NULL;
+		return ERR_PTR(-EOPNOTSUPP);
 	}
 
 	engine = devm_kzalloc(dev, sizeof(*engine), GFP_KERNEL);
@@ -657,7 +657,7 @@ static struct qcom_ice *of_qcom_ice_get(struct device *dev)
 	struct device_node *node __free(device_node) = of_parse_phandle(dev->of_node,
 									"qcom,ice", 0);
 	if (!node)
-		return NULL;
+		return ERR_PTR(-ENODEV);
 
 	pdev = of_find_device_by_node(node);
 	if (!pdev) {
@@ -701,8 +701,7 @@ static void devm_of_qcom_ice_put(struct device *dev, void *res)
  * phandle via 'qcom,ice' property to an ICE DT, the ICE instance will already
  * be created and so this function will return that instead.
  *
- * Return: ICE pointer on success, NULL if there is no ICE data provided by the
- * consumer or ERR_PTR() on error.
+ * Return: ICE pointer on success, ERR_PTR() on error.
  */
 struct qcom_ice *devm_of_qcom_ice_get(struct device *dev)
 {
@@ -713,7 +712,7 @@ struct qcom_ice *devm_of_qcom_ice_get(struct device *dev)
 		return ERR_PTR(-ENOMEM);
 
 	ice = of_qcom_ice_get(dev);
-	if (!IS_ERR_OR_NULL(ice)) {
+	if (!IS_ERR(ice)) {
 		*dr = ice;
 		devres_add(dev, dr);
 	} else {

-- 
2.51.0