From: Mykola Lysenko Date: Fri, 25 Dec 2015 08:14:48 +0000 (+0800) Subject: drm/dp/mst: fix in RAD element access X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7a11a334aa6af4c65c6a0d81b60c97fc18673532;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/dp/mst: fix in RAD element access This is needed to receive correct port number from RAD, so MSTB could be found Acked-by: Dave Airlie Signed-off-by: Mykola Lysenko Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index d809ce8a4f28..6ed90a2437e5 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -1044,7 +1044,7 @@ static void build_mst_prop_path(const struct drm_dp_mst_branch *mstb, 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); } @@ -1195,7 +1195,7 @@ 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) {