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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2018-08-27 10:07:42 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-13 10:45:17 +0200 |
| commit | 329ef07f7fb83d4de62c239e376a6a0e04ff4b3c (patch) | |
| tree | 3c358d9e7b9eed487e60460c7ebe7d17a2083fa3 | |
| parent | b0434aaec76f379a23452b40cab4b036fc94c8b7 (diff) | |
| download | linux-stable-329ef07f7fb83d4de62c239e376a6a0e04ff4b3c.tar.gz | |
drm_dp_mst_topology: fix broken drm_dp_sideband_parse_remote_dpcd_read()
commit a4c30a4861c54af78c4eb8b7855524c1a96d9f80 upstream.
When parsing the reply of a DP_REMOTE_DPCD_READ DPCD command the
result is wrong due to a missing idx increment.
This was never noticed since DP_REMOTE_DPCD_READ is currently not
used, but if you enable it, then it is all wrong.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e72ddac2-1dc0-100a-d816-9ac98ac009dd@xs4all.nl
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/drm_dp_mst_topology.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index fc978603fc94..7c3c323773d3 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -439,6 +439,7 @@ static bool drm_dp_sideband_parse_remote_dpcd_read(struct drm_dp_sideband_msg_rx if (idx > raw->curlen) goto fail_len; repmsg->u.remote_dpcd_read_ack.num_bytes = raw->msg[idx]; + idx++; if (idx > raw->curlen) goto fail_len; |