+static void stex_ss_mu_intr(struct st_hba *hba)
+{
+ struct status_msg *resp;
+ struct st_ccb *ccb;
+ __le32 *scratch;
+ unsigned int size;
+ int count = 0;
+ u32 value;
+ u16 tag;
+
+ if (unlikely(hba->out_req_cnt <= 0 ||
+ hba->mu_status == MU_STATE_RESETTING))
+ return;
+
+ while (count < hba->sts_count) {
+ scratch = hba->scratch + hba->status_tail;
+ value = le32_to_cpu(*scratch);
+ if (unlikely(!(value & SS_STS_NORMAL)))
+ return;
+
+ resp = hba->status_buffer + hba->status_tail;
+ *scratch = 0;
+ ++count;
+ ++hba->status_tail;
+ hba->status_tail %= hba->sts_count+1;
+
+ tag = (u16)value;
+ if (unlikely(tag >= hba->host->can_queue)) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): invalid tag\n", pci_name(hba->pdev));
+ continue;
+ }
+
+ hba->out_req_cnt--;
+ ccb = &hba->ccb[tag];
+ if (unlikely(hba->wait_ccb == ccb))
+ hba->wait_ccb = NULL;
+ if (unlikely(ccb->req == NULL)) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): lagging req\n", pci_name(hba->pdev));
+ continue;
+ }
+
+ ccb->req = NULL;
+ if (likely(value & SS_STS_DONE)) { /* normal case */
+ ccb->srb_status = SRB_STATUS_SUCCESS;
+ ccb->scsi_status = SAM_STAT_GOOD;
+ } else {
+ ccb->srb_status = resp->srb_status;
+ ccb->scsi_status = resp->scsi_status;
+ size = resp->payload_sz * sizeof(u32);
+ if (unlikely(size < sizeof(*resp) - STATUS_VAR_LEN ||
+ size > sizeof(*resp))) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): bad status size\n",
+ pci_name(hba->pdev));
+ } else {
+ size -= sizeof(*resp) - STATUS_VAR_LEN;
+ if (size)
+ stex_copy_data(ccb, resp, size);
+ }
+ if (likely(ccb->cmd != NULL))
+ stex_check_cmd(hba, ccb, resp);
+ }
+
+ if (likely(ccb->cmd != NULL)) {
+ scsi_dma_unmap(ccb->cmd);
+ stex_scsi_done(ccb);
+ } else
+ ccb->req_type = 0;
+ }
+}
+
+static irqreturn_t stex_ss_intr(int irq, void *__hba)
+{
+ struct st_hba *hba = __hba;
+ void __iomem *base = hba->mmio_base;
+ u32 data;
+ unsigned long flags;
+ int handled = 0;
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+
+ data = readl(base + YI2H_INT);
+ if (data && data != 0xffffffff) {
+ /* clear the interrupt */
+ writel(data, base + YI2H_INT_C);
+ stex_ss_mu_intr(hba);
+ handled = 1;
+ }
+
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ return IRQ_RETVAL(handled);
+}
+
+static int stex_common_handshake(struct st_hba *hba)