From: Georgi Djakov <georgi.djakov@linaro.org>
Date: Mon, 6 Jan 2020 17:27:46 +0000 (+0200)
Subject: interconnect: Check for valid path in icc_set_bw()
X-Git-Tag: v5.6-rc1~136^2~3^2~2
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7d7899c5297be8cd6095bcddecbbedccb34dd161;p=linux.git

interconnect: Check for valid path in icc_set_bw()

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

Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 10dde5df9251..f277e467156f 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;