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From: Dheeraj Reddy Jonnalagadda <dheeraj.linuxdev@gmail.com>
To: andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org
Cc: Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se,
	jernej.skrabec@gmail.com, maarten.lankhorst@linux.intel.com,
	mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com,
	simona@ffwll.ch, dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org,
	Dheeraj Reddy Jonnalagadda <dheeraj.linuxdev@gmail.com>
Subject: [PATCH drm-next] drm/bridge: it6505: Fix unreachable loop increment in KSV list check
Date: Tue,  7 Jan 2025 16:37:40 +0530	[thread overview]
Message-ID: <20250107110740.42892-1-dheeraj.linuxdev@gmail.com> (raw)

The inner loop in it6505_hdcp_part2_ksvlist_check had an unreachable
increment due to returning true before the loop could continue.
Restructure the loop to only return after verifying all 5 entries
match, making the loop increment reachable.

Fixes: 0989c02c7a5c ("drm/bridge: it6505: fix HDCP CTS compare V matching")
Closes: https://scan7.scan.coverity.com/#/project-view/52337/11354?selectedIssue=1602785
Signed-off-by: Dheeraj Reddy Jonnalagadda <dheeraj.linuxdev@gmail.com>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index 88ef76a37fe6..2ff2245abdeb 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -2255,8 +2255,10 @@ static bool it6505_hdcp_part2_ksvlist_check(struct it6505 *it6505)
 			    av[i][1] != av[i][2] || bv[i][0] != av[i][3])
 				break;
 
-			DRM_DEV_DEBUG_DRIVER(dev, "V' all match!! %d, %d", retry, i);
-			return true;
+			if (i == 4) {
+				DRM_DEV_DEBUG_DRIVER(dev, "V' all match!! %d, %d", retry, i);
+				return true;
+			}
 		}
 	}
 
-- 
2.34.1


             reply	other threads:[~2025-01-08  0:34 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-01-07 11:07 Dheeraj Reddy Jonnalagadda [this message]
2025-01-08  2:08 ` [PATCH drm-next] drm/bridge: it6505: Fix unreachable loop increment in KSV list check Dmitry Baryshkov

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