From 6d7860f5750d73da2fa1a1f6c9405058a593fa32 Mon Sep 17 00:00:00 2001
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Mon, 7 Nov 2022 09:44:03 +0800
Subject: [PATCH] soc: qcom: apr: Add check for idr_alloc and
of_property_read_string_index
As idr_alloc() and of_property_read_string_index() can return negative
numbers, it should be better to check the return value and deal with
the exception.
Therefore, it should be better to use goto statement to stop and return
error.
Fixes: 6adba21eb434 ("soc: qcom: Add APR bus driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221107014403.3606-1-jiasheng@iscas.ac.cn
---
drivers/soc/qcom/apr.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/soc/qcom/apr.c b/drivers/soc/qcom/apr.c
index b4046f393575e..cd44f17dad3d0 100644
--- a/drivers/soc/qcom/apr.c
+++ b/drivers/soc/qcom/apr.c
@@ -454,11 +454,19 @@ static int apr_add_device(struct device *dev, struct device_node *np,
adev->dev.driver = NULL;
spin_lock(&apr->svcs_lock);
- idr_alloc(&apr->svcs_idr, svc, svc_id, svc_id + 1, GFP_ATOMIC);
+ ret = idr_alloc(&apr->svcs_idr, svc, svc_id, svc_id + 1, GFP_ATOMIC);
spin_unlock(&apr->svcs_lock);
+ if (ret < 0) {
+ dev_err(dev, "idr_alloc failed: %d\n", ret);
+ goto out;
+ }
- of_property_read_string_index(np, "qcom,protection-domain",
- 1, &adev->service_path);
+ ret = of_property_read_string_index(np, "qcom,protection-domain",
+ 1, &adev->service_path);
+ if (ret < 0) {
+ dev_err(dev, "Failed to read second value of qcom,protection-domain\n");
+ goto out;
+ }
dev_info(dev, "Adding APR/GPR dev: %s\n", dev_name(&adev->dev));
@@ -468,6 +476,7 @@ static int apr_add_device(struct device *dev, struct device_node *np,
put_device(&adev->dev);
}
+out:
return ret;
}
--
2.30.2