From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To: "Harry Wentland" <harry.wentland@amd.com>,
"Leo Li" <sunpeng.li@amd.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"David (ChunMing) Zhou" <David1.Zhou@amd.com>,
"David Airlie" <airlied@linux.ie>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Mikita Lipski" <mikita.lipski@amd.com>,
"Lyude Paul" <lyude@redhat.com>,
"Nicholas Kazlauskas" <nicholas.kazlauskas@amd.com>
Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH] drm/amd/display: Fix unsigned variable compared to less than zero
Date: Mon, 11 Nov 2019 11:25:43 -0600 [thread overview]
Message-ID: <20191111172543.GA31748@embeddedor> (raw)
Currenly, the error check below on variable *vcpi_slots* is always
false because it is a uint64_t type variable, hence, the values
this variable can hold are never less than zero:
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c:
4870 if (dm_new_connector_state->vcpi_slots < 0) {
4871 DRM_DEBUG_ATOMIC("failed finding vcpi slots: %d\n", (int)dm_new_connector_stat e->vcpi_slots);
4872 return dm_new_connector_state->vcpi_slots;
4873 }
Fix this by making *vcpi_slots* of int type.
Addresses-Coverity: 1487838 ("Unsigned compared against 0")
Fixes: b4c578f08378 ("drm/amd/display: Add MST atomic routines")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 6db07e9e33ab..a8fc90a927d6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -403,7 +403,7 @@ struct dm_connector_state {
bool underscan_enable;
bool freesync_capable;
uint8_t abm_level;
- uint64_t vcpi_slots;
+ int vcpi_slots;
uint64_t pbn;
};
--
2.23.0
next reply other threads:[~2019-11-11 18:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-11 17:25 Gustavo A. R. Silva [this message]
2019-11-11 17:46 ` [PATCH] drm/amd/display: Fix unsigned variable compared to less than zero Mikita Lipski
2019-11-11 19:27 ` Gustavo A. R. Silva
2019-11-11 22:39 ` Alex Deucher
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