This patch is
Reviewed-by: Ian Romanick <ian.d.romanick@xxxxxxxxx>
On 02/11/2015 03:42 AM, Daniel Vetter wrote:
> We really have to do this to avoid surprises when extending the ABI
> later on. Especially when growing the structures.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> ---
> xf86drmMode.c | 55 ++++++++++++++++++++++++++++---------------------------
> 1 file changed, 28 insertions(+), 27 deletions(-)
>
> diff --git a/xf86drmMode.c b/xf86drmMode.c
> index e3e599bdc39d..9ea8fe721842 100644
> --- a/xf86drmMode.c
> +++ b/xf86drmMode.c
> @@ -61,7 +61,7 @@
> #define VG(x)
> #endif
>
> -#define VG_CLEAR(s) VG(memset(&s, 0, sizeof(s)))
> +#define memclear(s) memset(&s, 0, sizeof(s))
>
> #define U642VOID(x) ((void *)(unsigned long)(x))
> #define VOID2U64(x) ((uint64_t)(unsigned long)(x))
> @@ -164,7 +164,7 @@ drmModeResPtr drmModeGetResources(int fd)
> drmModeResPtr r = 0;
>
> retry:
> - memset(&res, 0, sizeof(struct drm_mode_card_res));
> + memclear(res);
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
> return 0;
>
> @@ -259,7 +259,7 @@ int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
> struct drm_mode_fb_cmd f;
> int ret;
>
> - VG_CLEAR(f);
> + memclear(f);
> f.width = width;
> f.height = height;
> f.pitch = pitch;
> @@ -282,6 +282,7 @@ int drmModeAddFB2(int fd, uint32_t width, uint32_t height,
> struct drm_mode_fb_cmd2 f;
> int ret;
>
> + memclear(f);
> f.width = width;
> f.height = height;
> f.pixel_format = pixel_format;
> @@ -300,8 +301,6 @@ int drmModeAddFB2(int fd, uint32_t width, uint32_t height,
> int drmModeRmFB(int fd, uint32_t bufferId)
> {
> return DRM_IOCTL(fd, DRM_IOCTL_MODE_RMFB, &bufferId);
> -
> -
> }
>
> drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
> @@ -309,6 +308,7 @@ drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
> struct drm_mode_fb_cmd info;
> drmModeFBPtr r;
>
> + memclear(info);
> info.fb_id = buf;
>
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETFB, &info))
> @@ -331,8 +331,9 @@ drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
> int drmModeDirtyFB(int fd, uint32_t bufferId,
> drmModeClipPtr clips, uint32_t num_clips)
> {
> - struct drm_mode_fb_dirty_cmd dirty = { 0 };
> + struct drm_mode_fb_dirty_cmd dirty;
>
> + memclear(dirty);
> dirty.fb_id = bufferId;
> dirty.clips_ptr = VOID2U64(clips);
> dirty.num_clips = num_clips;
> @@ -350,7 +351,7 @@ drmModeCrtcPtr drmModeGetCrtc(int fd, uint32_t crtcId)
> struct drm_mode_crtc crtc;
> drmModeCrtcPtr r;
>
> - VG_CLEAR(crtc);
> + memclear(crtc);
> crtc.crtc_id = crtcId;
>
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETCRTC, &crtc))
> @@ -384,7 +385,7 @@ int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
> {
> struct drm_mode_crtc crtc;
>
> - VG_CLEAR(crtc);
> + memclear(crtc);
> crtc.x = x;
> crtc.y = y;
> crtc.crtc_id = crtcId;
> @@ -394,8 +395,7 @@ int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
> if (mode) {
> memcpy(&crtc.mode, mode, sizeof(struct drm_mode_modeinfo));
> crtc.mode_valid = 1;
> - } else
> - crtc.mode_valid = 0;
> + }
>
> return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETCRTC, &crtc);
> }
> @@ -408,6 +408,7 @@ int drmModeSetCursor(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width
> {
> struct drm_mode_cursor arg;
>
> + memclear(arg);
> arg.flags = DRM_MODE_CURSOR_BO;
> arg.crtc_id = crtcId;
> arg.width = width;
> @@ -421,6 +422,7 @@ int drmModeSetCursor2(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t widt
> {
> struct drm_mode_cursor2 arg;
>
> + memclear(arg);
> arg.flags = DRM_MODE_CURSOR_BO;
> arg.crtc_id = crtcId;
> arg.width = width;
> @@ -436,6 +438,7 @@ int drmModeMoveCursor(int fd, uint32_t crtcId, int x, int y)
> {
> struct drm_mode_cursor arg;
>
> + memclear(arg);
> arg.flags = DRM_MODE_CURSOR_MOVE;
> arg.crtc_id = crtcId;
> arg.x = x;
> @@ -452,11 +455,8 @@ drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id)
> struct drm_mode_get_encoder enc;
> drmModeEncoderPtr r = NULL;
>
> + memclear(enc);
> enc.encoder_id = encoder_id;
> - enc.crtc_id = 0;
> - enc.encoder_type = 0;
> - enc.possible_crtcs = 0;
> - enc.possible_clones = 0;
>
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETENCODER, &enc))
> return 0;
> @@ -483,7 +483,7 @@ drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id)
> drmModeConnectorPtr r = NULL;
>
> retry:
> - memset(&conn, 0, sizeof(struct drm_mode_get_connector));
> + memclear(conn);
> conn.connector_id = connector_id;
>
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
> @@ -576,6 +576,7 @@ int drmModeAttachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_inf
> {
> struct drm_mode_mode_cmd res;
>
> + memclear(res);
> memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
> res.connector_id = connector_id;
>
> @@ -586,6 +587,7 @@ int drmModeDetachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_inf
> {
> struct drm_mode_mode_cmd res;
>
> + memclear(res);
> memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
> res.connector_id = connector_id;
>
> @@ -598,13 +600,8 @@ drmModePropertyPtr drmModeGetProperty(int fd, uint32_t property_id)
> struct drm_mode_get_property prop;
> drmModePropertyPtr r;
>
> - VG_CLEAR(prop);
> + memclear(prop);
> prop.prop_id = property_id;
> - prop.count_enum_blobs = 0;
> - prop.count_values = 0;
> - prop.flags = 0;
> - prop.enum_blob_ptr = 0;
> - prop.values_ptr = 0;
>
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop))
> return 0;
> @@ -667,8 +664,7 @@ drmModePropertyBlobPtr drmModeGetPropertyBlob(int fd, uint32_t blob_id)
> struct drm_mode_get_blob blob;
> drmModePropertyBlobPtr r;
>
> - blob.length = 0;
> - blob.data = 0;
> + memclear(blob);
> blob.blob_id = blob_id;
>
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
> @@ -708,6 +704,7 @@ int drmModeConnectorSetProperty(int fd, uint32_t connector_id, uint32_t property
> {
> struct drm_mode_connector_set_property osp;
>
> + memclear(osp);
> osp.connector_id = connector_id;
> osp.prop_id = property_id;
> osp.value = value;
> @@ -818,6 +815,7 @@ int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
> {
> struct drm_mode_crtc_lut l;
>
> + memclear(l);
> l.crtc_id = crtc_id;
> l.gamma_size = size;
> l.red = VOID2U64(red);
> @@ -832,6 +830,7 @@ int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
> {
> struct drm_mode_crtc_lut l;
>
> + memclear(l);
> l.crtc_id = crtc_id;
> l.gamma_size = size;
> l.red = VOID2U64(red);
> @@ -897,11 +896,11 @@ int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
> {
> struct drm_mode_crtc_page_flip flip;
>
> + memclear(flip);
> flip.fb_id = fb_id;
> flip.crtc_id = crtc_id;
> flip.user_data = VOID2U64(user_data);
> flip.flags = flags;
> - flip.reserved = 0;
>
> return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip);
> }
> @@ -916,6 +915,7 @@ int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
> {
> struct drm_mode_set_plane s;
>
> + memclear(s);
> s.plane_id = plane_id;
> s.crtc_id = crtc_id;
> s.fb_id = fb_id;
> @@ -939,7 +939,7 @@ drmModePlanePtr drmModeGetPlane(int fd, uint32_t plane_id)
> drmModePlanePtr r = 0;
>
> retry:
> - memset(&ovr, 0, sizeof(struct drm_mode_get_plane));
> + memclear(ovr);
> ovr.plane_id = plane_id;
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANE, &ovr))
> return 0;
> @@ -999,7 +999,7 @@ drmModePlaneResPtr drmModeGetPlaneResources(int fd)
> drmModePlaneResPtr r = 0;
>
> retry:
> - memset(&res, 0, sizeof(struct drm_mode_get_plane_res));
> + memclear(res);
> if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANERESOURCES, &res))
> return 0;
>
> @@ -1056,7 +1056,7 @@ drmModeObjectPropertiesPtr drmModeObjectGetProperties(int fd,
> uint32_t count;
>
> retry:
> - memset(&properties, 0, sizeof(struct drm_mode_obj_get_properties));
> + memclear(properties);
> properties.obj_id = object_id;
> properties.obj_type = object_type;
>
> @@ -1122,6 +1122,7 @@ int drmModeObjectSetProperty(int fd, uint32_t object_id, uint32_t object_type,
> {
> struct drm_mode_obj_set_property prop;
>
> + memclear(prop);
> prop.value = value;
> prop.prop_id = property_id;
> prop.obj_id = object_id;
>
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