+ drive_info_struct *drvinfo;
+
+ /* Get information about the disk and modify the driver structure */
+ inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
+ drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
+ if (inq_buff == NULL || drvinfo == NULL)
+ goto mem_msg;
+
+ /* testing to see if 16-byte CDBs are already being used */
+ if (h->cciss_read == CCISS_READ_16) {
+ cciss_read_capacity_16(h->ctlr, drv_index, 1,
+ &total_size, &block_size);
+
+ } else {
+ cciss_read_capacity(ctlr, drv_index, 1,
+ &total_size, &block_size);
+
+ /* if read_capacity returns all F's this volume is >2TB */
+ /* in size so we switch to 16-byte CDB's for all */
+ /* read/write ops */
+ if (total_size == 0xFFFFFFFFULL) {
+ cciss_read_capacity_16(ctlr, drv_index, 1,
+ &total_size, &block_size);
+ h->cciss_read = CCISS_READ_16;
+ h->cciss_write = CCISS_WRITE_16;
+ } else {
+ h->cciss_read = CCISS_READ_10;
+ h->cciss_write = CCISS_WRITE_10;
+ }
+ }
+
+ cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
+ inq_buff, drvinfo);
+ drvinfo->block_size = block_size;
+ drvinfo->nr_blocks = total_size + 1;
+
+ cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
+ sizeof(drvinfo->serial_no));
+
+ /* Is it the same disk we already know, and nothing's changed? */
+ if (h->drv[drv_index].raid_level != -1 &&
+ ((memcmp(drvinfo->serial_no,
+ h->drv[drv_index].serial_no, 16) == 0) &&
+ drvinfo->block_size == h->drv[drv_index].block_size &&
+ drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
+ drvinfo->heads == h->drv[drv_index].heads &&
+ drvinfo->sectors == h->drv[drv_index].sectors &&
+ drvinfo->cylinders == h->drv[drv_index].cylinders)) {
+ /* The disk is unchanged, nothing to update */
+ goto freeret;
+ }
+
+ /* Not the same disk, or something's changed, so we need to */
+ /* deregister it, and re-register it, if it's not in use. */