From: Thierry Reding <tred...@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 <tred...@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 adf79be42c1e..1b8a471ec1b7 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -315,6 +315,17 @@ 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
@@ -331,7 +342,7 @@ 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)
--
2.15.1
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