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From:   Georgi Djakov <georgi.djakov@linaro.org>
To:     linux-pm@vger.kernel.org
Cc:     bjorn.andersson@linaro.org, evgreen@chromium.org,
        daidavid1@codeaurora.org, okukatla@codeaurora.org,
        jcrouse@codeaurora.org, georgi.djakov@linaro.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v2] interconnect: Check for valid path in icc_set_bw()
Date:   Mon,  6 Jan 2020 19:27:46 +0200
Message-Id: <20200106172746.19803-1-georgi.djakov@linaro.org>
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Sender: linux-kernel-owner@vger.kernel.org
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Use IS_ERR() to ensure that the path passed to icc_set_bw() is valid.

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---
v2:
- Use WARN_ON() instead of pr_err() (Bjorn)

 drivers/interconnect/core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 63c164264b73..d2ba5ae7d25b 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -495,9 +495,12 @@ int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
 	size_t i;
 	int ret;
 
-	if (!path || !path->num_nodes)
+	if (!path)
 		return 0;
 
+	if (WARN_ON(IS_ERR(path) || !path->num_nodes))
+		return -EINVAL;
+
 	mutex_lock(&icc_lock);
 
 	old_avg = path->reqs[0].avg_bw;