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| author | José Expósito <jose.exposito89@gmail.com> | 2022-01-09 19:42:45 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-01-11 15:44:27 -0500 |
| commit | 978ffac878fd64039f95798b15b430032d2d89d5 (patch) | |
| tree | 951ec7a7cf2a42126531bf6ae09891998d69803e | |
| parent | 8b5da5a458c95ad49571a6a6285800bf13409616 (diff) | |
| download | linux-stable-978ffac878fd64039f95798b15b430032d2d89d5.tar.gz linux-stable-978ffac878fd64039f95798b15b430032d2d89d5.tar.bz2 linux-stable-978ffac878fd64039f95798b15b430032d2d89d5.zip | |
drm/amd/display: invalid parameter check in dmub_hpd_callback
The function performs a check on the "adev" input parameter, however, it
is used before the check.
Initialize the "dev" variable after the sanity check to avoid a possible
NULL pointer dereference.
Fixes: e27c41d5b0681 ("drm/amd/display: Support for DMUB HPD interrupt handling")
Addresses-Coverity-ID: 1493909 ("Null pointer dereference")
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index b7dc98c9f08b..7f9773f8dab6 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -658,7 +658,7 @@ static void dmub_hpd_callback(struct amdgpu_device *adev, struct drm_connector_list_iter iter; struct dc_link *link; uint8_t link_index = 0; - struct drm_device *dev = adev->dm.ddev; + struct drm_device *dev; if (adev == NULL) return; @@ -675,6 +675,7 @@ static void dmub_hpd_callback(struct amdgpu_device *adev, link_index = notify->link_index; link = adev->dm.dc->links[link_index]; + dev = adev->dm.ddev; drm_connector_list_iter_begin(dev, &iter); drm_for_each_connector_iter(connector, &iter) { |