From 5a811126d38f9767a20cc271b34db7c8efc5a46c Mon Sep 17 00:00:00 2001
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Fri, 31 Dec 2021 17:44:19 +0800
Subject: [PATCH] soc: qcom: rpmpd: Check for null return of devm_kcalloc
Git-commit: 5a811126d38f9767a20cc271b34db7c8efc5a46c
Patch-mainline: v5.18-rc1
References: git-fixes

Because of the possible failure of the allocation, data->domains might
be NULL pointer and will cause the dereference of the NULL pointer
later.
Therefore, it might be better to check it and directly return -ENOMEM
without releasing data manually if fails, because the comment of the
devm_kmalloc() says "Memory allocated with this function is
automatically freed on driver detach.".

Fixes: bbe3a66c3f5a ("soc: qcom: rpmpd: Add a Power domain driver to model corners")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211231094419.1941054-1-jiasheng@iscas.ac.cn
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/soc/qcom/rpmpd.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/soc/qcom/rpmpd.c b/drivers/soc/qcom/rpmpd.c
index 0a8d8d24bfb7..624b5630feb8 100644
--- a/drivers/soc/qcom/rpmpd.c
+++ b/drivers/soc/qcom/rpmpd.c
@@ -610,6 +610,9 @@ static int rpmpd_probe(struct platform_device *pdev)
 
 	data->domains = devm_kcalloc(&pdev->dev, num, sizeof(*data->domains),
 				     GFP_KERNEL);
+	if (!data->domains)
+		return -ENOMEM;
+
 	data->num_domains = num;
 
 	for (i = 0; i < num; i++) {
-- 
2.31.1