[SCSI] qla2xxx: Add support to dynamically enable/disable ZIO.

ISP23xx and ISP24xx chips have support for an adaptive
method of posting SCSI command completions for multiple SCSI
commands during a single system interrupt.

SCSI commands are placed on the system response queue
without interrupting the host until 1) a delay timer
expires; or 2) a SCSI command completes with an error.

As long as the host software (qla2xxx) services the response
queue for completions (this polling is done during
queuecommand()) within the 'delay timer' period, the
firmware will not generate system interrupt.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index e451941ad81d..c26b74da4054 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -76,8 +76,6 @@ extern char qla2x00_version_str[];
 extern int ql2xlogintimeout;
 extern int qlport_down_retry;
 extern int ql2xplogiabsentdevice;
-extern int ql2xenablezio;
-extern int ql2xintrdelaytimer;
 extern int ql2xloginretrycount;
 extern int ql2xfdmienable;
 
@@ -223,6 +221,7 @@ extern irqreturn_t qla2100_intr_handler(int, void *, struct pt_regs *);
 extern irqreturn_t qla2300_intr_handler(int, void *, struct pt_regs *);
 extern irqreturn_t qla24xx_intr_handler(int, void *, struct pt_regs *);
 extern void qla2x00_process_response_queue(struct scsi_qla_host *);
+extern void qla24xx_process_response_queue(struct scsi_qla_host *);
 
 /*
  * Global Function Prototypes in qla_sup.c source file.