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authorKrishna Gudipati <kgudipat@brocade.com>2012-03-14 01:38:15 +0100
committerJames Bottomley <JBottomley@Parallels.com>2012-03-28 10:50:34 +0200
commit1f67096ca5299ab67d06abeb4180c988960f9280 (patch)
tree24416b6486c9d7717f04a7e48838fbd55f5b8c11 /drivers
parent[SCSI] bfa: Add fc host issue lip support (diff)
downloadlinux-1f67096ca5299ab67d06abeb4180c988960f9280.tar.xz
linux-1f67096ca5299ab67d06abeb4180c988960f9280.zip
[SCSI] bfa: Modify ISR to process pending completions
Made changes to the driver ISR to process any pending completions even if the RME bit is not set in the interrupt status register. Signed-off-by: Krishna Gudipati <kgudipat@brocade.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/bfa/bfa_core.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/scsi/bfa/bfa_core.c b/drivers/scsi/bfa/bfa_core.c
index 4bd546bcc240..035c9d5caf01 100644
--- a/drivers/scsi/bfa/bfa_core.c
+++ b/drivers/scsi/bfa/bfa_core.c
@@ -231,16 +231,19 @@ bfa_reqq_resume(struct bfa_s *bfa, int qid)
}
}
-static inline void
+bfa_boolean_t
bfa_isr_rspq(struct bfa_s *bfa, int qid)
{
struct bfi_msg_s *m;
u32 pi, ci;
struct list_head *waitq;
+ bfa_boolean_t ret;
ci = bfa_rspq_ci(bfa, qid);
pi = bfa_rspq_pi(bfa, qid);
+ ret = (ci != pi);
+
while (ci != pi) {
m = bfa_rspq_elem(bfa, qid, ci);
WARN_ON(m->mhdr.msg_class >= BFI_MC_MAX);
@@ -260,6 +263,8 @@ bfa_isr_rspq(struct bfa_s *bfa, int qid)
waitq = bfa_reqq(bfa, qid);
if (!list_empty(waitq))
bfa_reqq_resume(bfa, qid);
+
+ return ret;
}
static inline void
@@ -320,6 +325,7 @@ bfa_intx(struct bfa_s *bfa)
{
u32 intr, qintr;
int queue;
+ bfa_boolean_t rspq_comp = BFA_FALSE;
intr = readl(bfa->iocfc.bfa_regs.intr_status);
@@ -332,11 +338,12 @@ bfa_intx(struct bfa_s *bfa)
*/
if (bfa->queue_process) {
for (queue = 0; queue < BFI_IOC_MAX_CQS; queue++)
- bfa_isr_rspq(bfa, queue);
+ if (bfa_isr_rspq(bfa, queue))
+ rspq_comp = BFA_TRUE;
}
if (!intr)
- return BFA_TRUE;
+ return (qintr | rspq_comp) ? BFA_TRUE : BFA_FALSE;
/*
* CPE completion queue interrupt