+#define INIT_ALLOC_SIZE 32
+
+static void ses_enclosure_data_process(struct enclosure_device *edev,
+ struct scsi_device *sdev,
+ int create)
+{
+ u32 result;
+ unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
+ int i, j, page7_len, len, components;
+ struct ses_device *ses_dev = edev->scratch;
+ int types = ses_dev->page1[10];
+ unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
+
+ if (!hdr_buf)
+ goto simple_populate;
+
+ /* re-read page 10 */
+ if (ses_dev->page10)
+ ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
+ /* Page 7 for the descriptors is optional */
+ result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
+ if (result)
+ goto simple_populate;
+
+ page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
+ /* add 1 for trailing '\0' we'll use */
+ buf = kzalloc(len + 1, GFP_KERNEL);
+ if (!buf)
+ goto simple_populate;
+ result = ses_recv_diag(sdev, 7, buf, len);
+ if (result) {
+ simple_populate:
+ kfree(buf);
+ buf = NULL;
+ desc_ptr = NULL;
+ len = 0;
+ page7_len = 0;
+ } else {
+ desc_ptr = buf + 8;
+ len = (desc_ptr[2] << 8) + desc_ptr[3];
+ /* skip past overall descriptor */
+ desc_ptr += len + 4;
+ if (ses_dev->page10)
+ addl_desc_ptr = ses_dev->page10 + 8;
+ }
+ type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
+ components = 0;
+ for (i = 0; i < types; i++, type_ptr += 4) {
+ for (j = 0; j < type_ptr[1]; j++) {
+ char *name = NULL;
+ struct enclosure_component *ecomp;
+
+ if (desc_ptr) {
+ if (desc_ptr >= buf + page7_len) {
+ desc_ptr = NULL;
+ } else {
+ len = (desc_ptr[2] << 8) + desc_ptr[3];
+ desc_ptr += 4;
+ /* Add trailing zero - pushes into
+ * reserved space */
+ desc_ptr[len] = '\0';
+ name = desc_ptr;
+ }
+ }
+ if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
+ type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
+
+ if (create)
+ ecomp = enclosure_component_register(edev,
+ components++,
+ type_ptr[0],
+ name);
+ else
+ ecomp = &edev->component[components++];
+
+ if (!IS_ERR(ecomp) && addl_desc_ptr)
+ ses_process_descriptor(ecomp,
+ addl_desc_ptr);
+ }
+ if (desc_ptr)
+ desc_ptr += len;
+
+ if (addl_desc_ptr)
+ addl_desc_ptr += addl_desc_ptr[1] + 2;
+
+ }
+ }
+ kfree(buf);
+ kfree(hdr_buf);
+}