drm: Correct arguments to list_tail_add in create blob ioctl

commit 8731b269f01e16193390c7276e70530366b8d626 upstream.

Arguments passed to list_add_tail were reversed resulting in deletion
of old blob property everytime the new one is added.

Fixes

commit e2f5d2ea479b9b2619965d43db70939589afe43a
Author: Daniel Stone <daniels@collabora.com>
Date:   Fri May 22 13:34:51 2015 +0100

    drm/mode: Add user blob-creation ioctl

Signed-off-by: Maneet Singh <mmaneetsingh@nvidia.com>
[seanpaul tweaked commit subject a little]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index fed748311b928cc534f781505a37686ec7a46ba3..48a16a69ed24ccbd5823529716a4e587d7068bb7 100644 (file)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -4573,7 +4573,7 @@ int drm_mode_createblob_ioctl(struct drm_device *dev,
         * not associated with any file_priv. */
        mutex_lock(&dev->mode_config.blob_lock);
        out_resp->blob_id = blob->base.id;
-       list_add_tail(&file_priv->blobs, &blob->head_file);
+       list_add_tail(&blob->head_file, &file_priv->blobs);
        mutex_unlock(&dev->mode_config.blob_lock);
 
        return 0;