diff options
| -rw-r--r-- | libdrm/xf86drmMode.c | 58 |
1 files changed, 43 insertions, 15 deletions
diff --git a/libdrm/xf86drmMode.c b/libdrm/xf86drmMode.c index 88b4fe3..8764fe3 100644 --- a/libdrm/xf86drmMode.c +++ b/libdrm/xf86drmMode.c @@ -358,37 +358,57 @@ drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id) drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id) { - struct drm_mode_get_connector conn; + struct drm_mode_get_connector conn, counts; drmModeConnectorPtr r = NULL; +retry: + memset(&conn, 0, sizeof(struct drm_mode_get_connector)); conn.connector_id = connector_id; - conn.connector_type_id = 0; - conn.connector_type = 0; - conn.count_modes = 0; - conn.modes_ptr = 0; - conn.count_props = 0; - conn.props_ptr = 0; - conn.prop_values_ptr = 0; - conn.count_encoders = 0; - conn.encoders_ptr = 0; if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn)) return 0; + counts = conn; + if (conn.count_props) { conn.props_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint32_t))); + if (!conn.props_ptr) + goto err_allocs; conn.prop_values_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint64_t))); + if (!conn.prop_values_ptr) + goto err_allocs; } - if (conn.count_modes) + if (conn.count_modes) { conn.modes_ptr = VOID2U64(drmMalloc(conn.count_modes*sizeof(struct drm_mode_modeinfo))); + if (!conn.modes_ptr) + goto err_allocs; + } - if (conn.count_encoders) + if (conn.count_encoders) { conn.encoders_ptr = VOID2U64(drmMalloc(conn.count_encoders*sizeof(uint32_t))); + if (!conn.encoders_ptr) + goto err_allocs; + } if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn)) goto err_allocs; + /* The number of available connectors and etc may have changed with a + * hotplug event in between the ioctls, in which case the field is + * silently ignored by the kernel. + */ + if (counts.count_props < conn.count_props || + counts.count_modes < conn.count_modes || + counts.count_encoders < conn.count_encoders) { + drmFree(U642VOID(conn.props_ptr)); + drmFree(U642VOID(conn.prop_values_ptr)); + drmFree(U642VOID(conn.modes_ptr)); + drmFree(U642VOID(conn.encoders_ptr)); + + goto retry; + } + if(!(r = drmMalloc(sizeof(*r)))) { goto err_allocs; } @@ -401,7 +421,6 @@ drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id) /* convert subpixel from kernel to userspace */ r->subpixel = conn.subpixel + 1; r->count_modes = conn.count_modes; - /* TODO we should test if these alloc & cpy fails. */ r->count_props = conn.count_props; r->props = drmAllocCpy(U642VOID(conn.props_ptr), conn.count_props, sizeof(uint32_t)); r->prop_values = drmAllocCpy(U642VOID(conn.prop_values_ptr), conn.count_props, sizeof(uint64_t)); @@ -411,8 +430,17 @@ drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id) r->connector_type = conn.connector_type; r->connector_type_id = conn.connector_type_id; - if (!r->props || !r->prop_values || !r->modes || !r->encoders) - goto err_allocs; + if ((r->count_props && !r->props) || + (r->count_props && !r->prop_values) || + (r->count_modes && !r->modes) || + (r->count_encoders && !r->encoders)) { + drmFree(r->props); + drmFree(r->prop_values); + drmFree(r->modes); + drmFree(r->encoders); + drmFree(r); + r = 0; + } err_allocs: drmFree(U642VOID(conn.prop_values_ptr)); |