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| author | Mykola Lysenko <Mykola.Lysenko@amd.com> | 2015-12-25 11:14:48 +0300 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-02-10 06:56:21 +0300 |
| commit | aefd4d23b58c5c30d84b1df15dff155520b6be4f (patch) | |
| tree | dd22e88853e9817445dcebce6e14cd66c0e4f931 /drivers/gpu | |
| parent | d42f4a5484eba5a6106771d7f6afe8bfe90ca779 (diff) | |
| download | linux-aefd4d23b58c5c30d84b1df15dff155520b6be4f.tar.xz | |
drm/dp/mst: fix in RAD element access
[ Upstream commit 7a11a334aa6af4c65c6a0d81b60c97fc18673532 ]
This is needed to receive correct port
number from RAD, so MSTB could be found
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Mykola Lysenko <Mykola.Lysenko@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_mst_topology.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index c692b9abce27..8e70ba58b33b 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -1022,7 +1022,7 @@ static void build_mst_prop_path(struct drm_dp_mst_port *port, snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id); for (i = 0; i < (mstb->lct - 1); i++) { int shift = (i % 2) ? 0 : 4; - int port_num = mstb->rad[i / 2] >> shift; + int port_num = (mstb->rad[i / 2] >> shift) & 0xf; snprintf(temp, sizeof(temp), "-%d", port_num); strlcat(proppath, temp, proppath_size); } @@ -1159,7 +1159,7 @@ static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_ for (i = 0; i < lct - 1; i++) { int shift = (i % 2) ? 0 : 4; - int port_num = rad[i / 2] >> shift; + int port_num = (rad[i / 2] >> shift) & 0xf; list_for_each_entry(port, &mstb->ports, next) { if (port->port_num == port_num) { |