There is a potential execution path in which function
platform_get_resource() returns NULL. If this happens,
we will end up having a NULL pointer dereference.
Fix this by adding asanity check in order to avoid a
NULL pointer dereference.
This code was detected with the help of Coccinelle.
Cc: sta...@vger.kernel.org
Fixes: 97b7129cd2af ("reset: hisilicon: change the definition of
hisi_reset_init")
Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
---
drivers/clk/hisilicon/reset.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/clk/hisilicon/reset.c b/drivers/clk/hisilicon/reset.c
index 2a5015c..5dfb48b 100644
--- a/drivers/clk/hisilicon/reset.c
+++ b/drivers/clk/hisilicon/reset.c
@@ -109,6 +109,9 @@ struct hisi_reset_controller *hisi_reset_init(struct
platform_device *pdev)
return NULL;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return NULL;
+
rstc->membase = devm_ioremap(&pdev->dev,
res->start, resource_size(res));
if (!rstc->membase)
--
2.7.4
