+static ssize_t
+lpfc_poll_show(struct class_device *cdev, char *buf)
+{
+ struct Scsi_Host *host = class_to_shost(cdev);
+ struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata;
+
+ return snprintf(buf, PAGE_SIZE, "%#x\n", phba->cfg_poll);
+}
+
+static ssize_t
+lpfc_poll_store(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct Scsi_Host *host = class_to_shost(cdev);
+ struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata;
+ uint32_t creg_val;
+ uint32_t old_val;
+ int val=0;
+
+ if (!isdigit(buf[0]))
+ return -EINVAL;
+
+ if (sscanf(buf, "%i", &val) != 1)
+ return -EINVAL;
+
+ if ((val & 0x3) != val)
+ return -EINVAL;
+
+ spin_lock_irq(phba->host->host_lock);
+
+ old_val = phba->cfg_poll;
+
+ if (val & ENABLE_FCP_RING_POLLING) {
+ if ((val & DISABLE_FCP_RING_INT) &&
+ !(old_val & DISABLE_FCP_RING_INT)) {
+ creg_val = readl(phba->HCregaddr);
+ creg_val &= ~(HC_R0INT_ENA << LPFC_FCP_RING);
+ writel(creg_val, phba->HCregaddr);
+ readl(phba->HCregaddr); /* flush */
+
+ lpfc_poll_start_timer(phba);
+ }
+ } else if (val != 0x0) {
+ spin_unlock_irq(phba->host->host_lock);
+ return -EINVAL;
+ }
+
+ if (!(val & DISABLE_FCP_RING_INT) &&
+ (old_val & DISABLE_FCP_RING_INT))
+ {
+ spin_unlock_irq(phba->host->host_lock);
+ del_timer(&phba->fcp_poll_timer);
+ spin_lock_irq(phba->host->host_lock);
+ creg_val = readl(phba->HCregaddr);
+ creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
+ writel(creg_val, phba->HCregaddr);
+ readl(phba->HCregaddr); /* flush */
+ }
+
+ phba->cfg_poll = val;
+
+ spin_unlock_irq(phba->host->host_lock);
+
+ return strlen(buf);
+}