[SCSI] qla2xxx: Remove interrupt request bit check in the response processing path in multiq mode.

Correct response-queue-0 processing by instructing the firmware
to run with interrupt-handshaking disabled, similarly to what is
now done for all non-0 response queues.  Since all
response-queues now run in the same mode, the driver no longer
needs the hot-path 'is-disabled-HCCR' test.

Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

5 files changed, 16 insertions, 31 deletions

diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index a336b4bc81a7..bce5b0435188 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -376,10 +376,8 @@ extern int qla2x00_dfs_remove(scsi_qla_host_t *);
 
 /* Globa function prototypes for multi-q */
 extern int qla25xx_request_irq(struct rsp_que *);
-extern int qla25xx_init_req_que(struct scsi_qla_host *, struct req_que *,
-        uint8_t);
-extern int qla25xx_init_rsp_que(struct scsi_qla_host *, struct rsp_que *,
-        uint8_t);
+extern int qla25xx_init_req_que(struct scsi_qla_host *, struct req_que *);
+extern int qla25xx_init_rsp_que(struct scsi_qla_host *, struct rsp_que *);
 extern int qla25xx_create_req_que(struct qla_hw_data *, uint16_t, uint8_t,
         uint16_t, uint8_t, uint8_t);
 extern int qla25xx_create_rsp_que(struct qla_hw_data *, uint16_t, uint8_t,
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index f6368a1d3021..986501759ad4 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1226,9 +1226,8 @@ qla24xx_config_rings(struct scsi_qla_host *vha)
                         icb->firmware_options_2 |=
                                 __constant_cpu_to_le32(BIT_18);
 
-                icb->firmware_options_2 |= __constant_cpu_to_le32(BIT_22);
+                icb->firmware_options_2 &= __constant_cpu_to_le32(~BIT_22);
                 icb->firmware_options_2 |= __constant_cpu_to_le32(BIT_23);
-                ha->rsp_q_map[0]->options = icb->firmware_options_2;
 
                 WRT_REG_DWORD(&reg->isp25mq.req_q_in, 0);
                 WRT_REG_DWORD(&reg->isp25mq.req_q_out, 0);
@@ -3493,7 +3492,7 @@ qla25xx_init_queues(struct qla_hw_data *ha)
                 rsp = ha->rsp_q_map[i];
                 if (rsp) {
                         rsp->options &= ~BIT_0;
-                        ret = qla25xx_init_rsp_que(base_vha, rsp, rsp->options);
+                        ret = qla25xx_init_rsp_que(base_vha, rsp);
                         if (ret != QLA_SUCCESS)
                                 DEBUG2_17(printk(KERN_WARNING
                                         "%s Rsp que:%d init failed\n", __func__,
@@ -3507,7 +3506,7 @@ qla25xx_init_queues(struct qla_hw_data *ha)
                 if (req) {
                 /* Clear outstanding commands array. */
                         req->options &= ~BIT_0;
-                        ret = qla25xx_init_req_que(base_vha, req, req->options);
+                        ret = qla25xx_init_req_que(base_vha, req);
                         if (ret != QLA_SUCCESS)
                                 DEBUG2_17(printk(KERN_WARNING
                                         "%s Req que:%d init failed\n", __func__,
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index e28ad81baf1e..b5554ea4693b 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1707,7 +1707,6 @@ qla25xx_msix_rsp_q(int irq, void *dev_id)
         struct qla_hw_data *ha;
         struct rsp_que *rsp;
         struct device_reg_24xx __iomem *reg;
-        uint16_t msix_disabled_hccr = 0;
 
         rsp = (struct rsp_que *) dev_id;
         if (!rsp) {
@@ -1720,17 +1719,8 @@ qla25xx_msix_rsp_q(int irq, void *dev_id)
 
         spin_lock_irq(&ha->hardware_lock);
 
-        msix_disabled_hccr = rsp->options;
-        if (!rsp->id)
-                msix_disabled_hccr &= __constant_cpu_to_le32(BIT_22);
-        else
-                msix_disabled_hccr &= __constant_cpu_to_le32(BIT_6);
-
         qla24xx_process_response_queue(rsp);
 
-        if (!msix_disabled_hccr)
-                WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
-
         spin_unlock_irq(&ha->hardware_lock);
 
         return IRQ_HANDLED;
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index f94ffbb98e95..723cd37294c3 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -3090,8 +3090,7 @@ verify_done:
 }
 
 int
-qla25xx_init_req_que(struct scsi_qla_host *vha, struct req_que *req,
-        uint8_t options)
+qla25xx_init_req_que(struct scsi_qla_host *vha, struct req_que *req)
 {
         int rval;
         unsigned long flags;
@@ -3101,7 +3100,7 @@ qla25xx_init_req_que(struct scsi_qla_host *vha, struct req_que *req,
         struct qla_hw_data *ha = vha->hw;
 
         mcp->mb[0] = MBC_INITIALIZE_MULTIQ;
-        mcp->mb[1] = options;
+        mcp->mb[1] = req->options;
         mcp->mb[2] = MSW(LSD(req->dma));
         mcp->mb[3] = LSW(LSD(req->dma));
         mcp->mb[6] = MSW(MSD(req->dma));
@@ -3128,7 +3127,7 @@ qla25xx_init_req_que(struct scsi_qla_host *vha, struct req_que *req,
         mcp->tov = 60;
 
         spin_lock_irqsave(&ha->hardware_lock, flags);
-        if (!(options & BIT_0)) {
+        if (!(req->options & BIT_0)) {
                 WRT_REG_DWORD(&reg->req_q_in, 0);
                 WRT_REG_DWORD(&reg->req_q_out, 0);
         }
@@ -3142,8 +3141,7 @@ qla25xx_init_req_que(struct scsi_qla_host *vha, struct req_que *req,
 }
 
 int
-qla25xx_init_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp,
-        uint8_t options)
+qla25xx_init_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 {
         int rval;
         unsigned long flags;
@@ -3153,7 +3151,7 @@ qla25xx_init_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp,
         struct qla_hw_data *ha = vha->hw;
 
         mcp->mb[0] = MBC_INITIALIZE_MULTIQ;
-        mcp->mb[1] = options;
+        mcp->mb[1] = rsp->options;
         mcp->mb[2] = MSW(LSD(rsp->dma));
         mcp->mb[3] = LSW(LSD(rsp->dma));
         mcp->mb[6] = MSW(MSD(rsp->dma));
@@ -3178,7 +3176,7 @@ qla25xx_init_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp,
         mcp->tov = 60;
 
         spin_lock_irqsave(&ha->hardware_lock, flags);
-        if (!(options & BIT_0)) {
+        if (!(rsp->options & BIT_0)) {
                 WRT_REG_DWORD(&reg->rsp_q_out, 0);
                 WRT_REG_DWORD(&reg->rsp_q_in, 0);
         }
diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
index f53179c46423..d27ceda50791 100644
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -471,7 +471,7 @@ qla25xx_delete_req_que(struct scsi_qla_host *vha, struct req_que *req)
 
         if (req) {
                 req->options |= BIT_0;
-                ret = qla25xx_init_req_que(vha, req, req->options);
+                ret = qla25xx_init_req_que(vha, req);
         }
         if (ret == QLA_SUCCESS)
                 qla25xx_free_req_que(vha, req);
@@ -486,7 +486,7 @@ qla25xx_delete_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 
         if (rsp) {
                 rsp->options |= BIT_0;
-                ret = qla25xx_init_rsp_que(vha, rsp, rsp->options);
+                ret = qla25xx_init_rsp_que(vha, rsp);
         }
         if (ret == QLA_SUCCESS)
                 qla25xx_free_rsp_que(vha, rsp);
@@ -502,7 +502,7 @@ int qla25xx_update_req_que(struct scsi_qla_host *vha, uint8_t que, uint8_t qos)
 
         req->options |= BIT_3;
         req->qos = qos;
-        ret = qla25xx_init_req_que(vha, req, req->options);
+        ret = qla25xx_init_req_que(vha, req);
         if (ret != QLA_SUCCESS)
                 DEBUG2_17(printk(KERN_WARNING "%s failed\n", __func__));
         /* restore options bit */
@@ -632,7 +632,7 @@ qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
         req->max_q_depth = ha->req_q_map[0]->max_q_depth;
         mutex_unlock(&ha->vport_lock);
 
-        ret = qla25xx_init_req_que(base_vha, req, options);
+        ret = qla25xx_init_req_que(base_vha, req);
         if (ret != QLA_SUCCESS) {
                 qla_printk(KERN_WARNING, ha, "%s failed\n", __func__);
                 mutex_lock(&ha->vport_lock);
@@ -710,7 +710,7 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
         if (ret)
                 goto que_failed;
 
-        ret = qla25xx_init_rsp_que(base_vha, rsp, options);
+        ret = qla25xx_init_rsp_que(base_vha, rsp);
         if (ret != QLA_SUCCESS) {
                 qla_printk(KERN_WARNING, ha, "%s failed\n", __func__);
                 mutex_lock(&ha->vport_lock);