[SCSI] advansys: clean up warnings

Fix typecast warnings and switch from check_region to request_region

(akpm: Ken and Jeffrey Phillips Freeman <jeffreyfreeman@syncleus.com> are
possible advansys testers)
Signed-off-by: Ken Witherow <ken@krwtech.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/advansys.c

@@ -4403,7 +4403,7 @@ advansys_detect(struct scsi_host_template *tpnt)
                         ASC_DBG1(1,
                                 "advansys_detect: probing I/O port 0x%x...\n",
                             iop);
-                        if (check_region(iop, ASC_IOADR_GAP) != 0) {
+			if (!request_region(iop, ASC_IOADR_GAP, "advansys")){
                             printk(
 "AdvanSys SCSI: specified I/O Port 0x%X is busy\n", iop);
                             /* Don't try this I/O port twice. */
@@ -4413,6 +4413,7 @@ advansys_detect(struct scsi_host_template *tpnt)
                             printk(
 "AdvanSys SCSI: specified I/O Port 0x%X has no adapter\n", iop);
                             /* Don't try this I/O port twice. */
+			    release_region(iop, ASC_IOADR_GAP);
                             asc_ioport[ioport] = 0;
                             goto ioport_try_again;
                         } else {
@@ -4431,6 +4432,7 @@ advansys_detect(struct scsi_host_template *tpnt)
                                   * 'ioport' past this board.
                                   */
                                  ioport++;
+				 release_region(iop, ASC_IOADR_GAP);
                                  goto ioport_try_again;
                             }
                         }
@@ -9740,13 +9742,14 @@ AscSearchIOPortAddr11(
     }
     for (; i < ASC_IOADR_TABLE_MAX_IX; i++) {
         iop_base = _asc_def_iop_base[i];
-        if (check_region(iop_base, ASC_IOADR_GAP) != 0) {
+	if (!request_region(iop_base, ASC_IOADR_GAP, "advansys")){
             ASC_DBG1(1,
                "AscSearchIOPortAddr11: check_region() failed I/O port 0x%x\n",
                      iop_base);
             continue;
         }
         ASC_DBG1(1, "AscSearchIOPortAddr11: probing I/O port 0x%x\n", iop_base);
+	release_region(iop_base, ASC_IOADR_GAP);
         if (AscFindSignature(iop_base)) {
             return (iop_base);
         }