[SCSI] bfa: fix interrupt coalescing setting

Do not update the coalesce flag of the intr_attr struct in driver config area
on config response.  This is to prevent the coalesce flag being reported as on
after an ioc disable/enable even if it was set to off before disable.

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 30 insertions, 13 deletions

diff --git a/drivers/scsi/bfa/bfa_iocfc.c b/drivers/scsi/bfa/bfa_iocfc.c
index 6f54bea356c..0776d74d40d 100644
--- a/drivers/scsi/bfa/bfa_iocfc.c
+++ b/drivers/scsi/bfa/bfa_iocfc.c
@@ -113,7 +113,6 @@ bfa_iocfc_send_cfg(void *bfa_arg)
         bfa_assert(cfg->fwcfg.num_cqs <= BFI_IOC_MAX_CQS);
         bfa_trc(bfa, cfg->fwcfg.num_cqs);
 
-        iocfc->cfgdone = BFA_FALSE;
         bfa_iocfc_reset_queues(bfa);
 
         /**
@@ -145,6 +144,15 @@ bfa_iocfc_send_cfg(void *bfa_arg)
         }
 
         /**
+         * Enable interrupt coalescing if it is driver init path
+         * and not ioc disable/enable path.
+         */
+        if (!iocfc->cfgdone)
+                cfg_info->intr_attr.coalesce = BFA_TRUE;
+
+        iocfc->cfgdone = BFA_FALSE;
+
+        /**
          * dma map IOC configuration itself
          */
         bfi_h2i_set(cfg_req.mh, BFI_MC_IOCFC, BFI_IOCFC_H2I_CFG_REQ,
@@ -364,7 +372,6 @@ bfa_iocfc_cfgrsp(struct bfa_s *bfa)
         struct bfa_iocfc_s              *iocfc   = &bfa->iocfc;
         struct bfi_iocfc_cfgrsp_s       *cfgrsp  = iocfc->cfgrsp;
         struct bfa_iocfc_fwcfg_s        *fwcfg   = &cfgrsp->fwcfg;
-        struct bfi_iocfc_cfg_s          *cfginfo = iocfc->cfginfo;
 
         fwcfg->num_cqs        = fwcfg->num_cqs;
         fwcfg->num_ioim_reqs  = bfa_os_ntohs(fwcfg->num_ioim_reqs);
@@ -373,10 +380,6 @@ bfa_iocfc_cfgrsp(struct bfa_s *bfa)
         fwcfg->num_uf_bufs    = bfa_os_ntohs(fwcfg->num_uf_bufs);
         fwcfg->num_rports     = bfa_os_ntohs(fwcfg->num_rports);
 
-        cfginfo->intr_attr.coalesce = cfgrsp->intr_attr.coalesce;
-        cfginfo->intr_attr.delay    = bfa_os_ntohs(cfgrsp->intr_attr.delay);
-        cfginfo->intr_attr.latency  = bfa_os_ntohs(cfgrsp->intr_attr.latency);
-
         iocfc->cfgdone = BFA_TRUE;
 
         /**
@@ -737,10 +740,20 @@ bfa_adapter_get_id(struct bfa_s *bfa)
 void
 bfa_iocfc_get_attr(struct bfa_s *bfa, struct bfa_iocfc_attr_s *attr)
 {
-        struct bfa_iocfc_s      *iocfc = &bfa->iocfc;
+        struct bfa_iocfc_s      *iocfc = &bfa->iocfc;
+
+        attr->intr_attr.coalesce = iocfc->cfginfo->intr_attr.coalesce;
+
+        attr->intr_attr.delay = iocfc->cfginfo->intr_attr.delay ?
+                        bfa_os_ntohs(iocfc->cfginfo->intr_attr.delay) :
+                        bfa_os_ntohs(iocfc->cfgrsp->intr_attr.delay);
+
+        attr->intr_attr.latency = iocfc->cfginfo->intr_attr.latency ?
+                        bfa_os_ntohs(iocfc->cfginfo->intr_attr.latency) :
+                        bfa_os_ntohs(iocfc->cfgrsp->intr_attr.latency);
+
+        attr->config    = iocfc->cfg;
 
-        attr->intr_attr = iocfc->cfginfo->intr_attr;
-        attr->config    = iocfc->cfg;
 }
 
 bfa_status_t
@@ -749,7 +762,10 @@ bfa_iocfc_israttr_set(struct bfa_s *bfa, struct bfa_iocfc_intr_attr_s *attr)
         struct bfa_iocfc_s              *iocfc = &bfa->iocfc;
         struct bfi_iocfc_set_intr_req_s *m;
 
-        iocfc->cfginfo->intr_attr = *attr;
+        iocfc->cfginfo->intr_attr.coalesce = attr->coalesce;
+        iocfc->cfginfo->intr_attr.delay = bfa_os_htons(attr->delay);
+        iocfc->cfginfo->intr_attr.latency = bfa_os_htons(attr->latency);
+
         if (!bfa_iocfc_is_operational(bfa))
                 return BFA_STATUS_OK;
 
@@ -759,9 +775,10 @@ bfa_iocfc_israttr_set(struct bfa_s *bfa, struct bfa_iocfc_intr_attr_s *attr)
 
         bfi_h2i_set(m->mh, BFI_MC_IOCFC, BFI_IOCFC_H2I_SET_INTR_REQ,
                         bfa_lpuid(bfa));
-        m->coalesce = attr->coalesce;
-        m->delay    = bfa_os_htons(attr->delay);
-        m->latency  = bfa_os_htons(attr->latency);
+        m->coalesce = iocfc->cfginfo->intr_attr.coalesce;
+        m->delay    = iocfc->cfginfo->intr_attr.delay;
+        m->latency  = iocfc->cfginfo->intr_attr.latency;
+
 
         bfa_trc(bfa, attr->delay);
         bfa_trc(bfa, attr->latency);