From: Thierry Reding treding@nvidia.com
Subsequent patches will add non-volatile fields to struct drm_dp_link, so introduce a function to zero out only the volatile fields.
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/drm/drm_dp_helper.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index ffc68d305afe..f5af71ec1b7d 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -336,6 +336,17 @@ int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux, } EXPORT_SYMBOL(drm_dp_dpcd_read_link_status);
+static void drm_dp_link_reset(struct drm_dp_link *link) +{ + if (!link) + return; + + link->revision = 0; + link->rate = 0; + link->num_lanes = 0; + link->capabilities = 0; +} + /** * drm_dp_link_probe() - probe a DisplayPort link for capabilities * @aux: DisplayPort AUX channel @@ -352,7 +363,7 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link) u8 values[3]; int err;
- memset(link, 0, sizeof(*link)); + drm_dp_link_reset(link);
err = drm_dp_dpcd_read(aux, DP_DPCD_REV, values, sizeof(values)); if (err < 0)