From 1abd6b3304d47ff055063e0d59fc03bb27e0e196 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Thu, 3 Dec 2015 11:44:17 +0100 Subject: [PATCH] drm/tegra: dp: Add drm_dp_link_reset() implementation 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 --- drivers/gpu/drm/tegra/dp.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tegra/dp.c b/drivers/gpu/drm/tegra/dp.c index 50ba967ebcbd..c19060b8753a 100644 --- a/drivers/gpu/drm/tegra/dp.c +++ b/drivers/gpu/drm/tegra/dp.c @@ -8,6 +8,17 @@ #include "dp.h" +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 @@ -24,7 +35,7 @@ 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)