linux-kernel - [PATCH] interconnect: Check for valid path in icc_set

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Date:   Fri, 20 Dec 2019 19:13:10 +0200
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     linux-pm@...r.kernel.org
Cc:     bjorn.andersson@...aro.org, evgreen@...omium.org,
        daidavid1@...eaurora.org, okukatla@...eaurora.org,
        jcrouse@...eaurora.org, georgi.djakov@...aro.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] interconnect: Check for valid path in icc_set_bw()

Use IS_ERR() to ensure that the path passed to icc_set_bw() is valid.

Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
---
 drivers/interconnect/core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 63c164264b73..14a6f7ade44a 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -498,6 +498,11 @@ int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
 	if (!path || !path->num_nodes)
 		return 0;
 
+	if (IS_ERR(path)) {
+		pr_err("%s: invalid path=%ld\n", __func__, PTR_ERR(path));
+		return -EINVAL;
+	}
+
 	mutex_lock(&icc_lock);
 
 	old_avg = path->reqs[0].avg_bw;