[SCSI] qla2xxx: Don't fallback to interrupt-polling during re-initialization with MSI-X enabled.

ROMs in recent ISPs have MSI-X support, so it's no longer
necessary for the driver to fallback to interrupt polling during
ISP re-initialization.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -2370,6 +2370,8 @@ struct qla_hw_data {
 				IS_QLA84XX(ha))
 #define IS_QLA2XXX_MIDTYPE(ha)	(IS_QLA24XX(ha) || IS_QLA84XX(ha) || \
 				IS_QLA25XX(ha))
+#define IS_NOPOLLING_TYPE(ha)	(IS_QLA25XX(ha) && \
+				(ha)->flags.msix_enabled)
 
 #define IS_IIDMA_CAPABLE(ha)    ((ha)->device_type & DT_IIDMA)
 #define IS_FWI2_CAPABLE(ha)     ((ha)->device_type & DT_FWI2)

drivers/scsi/qla2xxx/qla_init.c

@@ -570,6 +570,9 @@ qla24xx_reset_risc(scsi_qla_host_t *vha)
 	}
 
 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	if (IS_NOPOLLING_TYPE(ha))
+		ha->isp_ops->enable_intrs(ha);
 }
 
 /**

drivers/scsi/qla2xxx/qla_mbx.c

@@ -123,8 +123,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 
 	/* Wait for mbx cmd completion until timeout */
 
-	if (!abort_active && io_lock_on) {
-
+	if ((!abort_active && io_lock_on) || IS_NOPOLLING_TYPE(ha)) {
 		set_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 
 		if (IS_FWI2_CAPABLE(ha))
@@ -218,7 +217,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 	/* Clean up */
 	ha->mcp = NULL;
 
-	if (abort_active || !io_lock_on) {
+	if ((abort_active || !io_lock_on) && !IS_NOPOLLING_TYPE(ha)) {
 		DEBUG11(printk("%s(%ld): checking for additional resp "
 		    "interrupt.\n", __func__, base_vha->host_no));
 

drivers/scsi/qla2xxx/qla_os.c

@@ -1329,6 +1329,8 @@ qla24xx_disable_intrs(struct qla_hw_data *ha)
 	unsigned long flags = 0;
 	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
 
+	if (IS_NOPOLLING_TYPE(ha))
+		return;
 	spin_lock_irqsave(&ha->hardware_lock, flags);
 	ha->interrupts_on = 0;
 	WRT_REG_DWORD(&reg->ictrl, 0);