From: Krishna Gudipati <kgudipat@brocade.com>
Date: Thu, 23 Aug 2012 02:52:18 +0000 (-0700)
Subject: [SCSI] bfa: Fix to process mbox interrupts only if interrupts are enabled in INTx... 
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9aec02497590cac5abdb5c044e3ec57010b1d808;p=linux-beck.git

[SCSI] bfa: Fix to process mbox interrupts only if interrupts are enabled in INTx mode.

- Made changes to process mbox and error interrupts only if interrupts are
  enabled, when running in INTx mode.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

diff --git a/drivers/scsi/bfa/bfa_core.c b/drivers/scsi/bfa/bfa_core.c
index a4129c929f24..b7c326f7a6d0 100644
--- a/drivers/scsi/bfa/bfa_core.c
+++ b/drivers/scsi/bfa/bfa_core.c
@@ -775,7 +775,8 @@ bfa_intx(struct bfa_s *bfa)
 	if (!intr)
 		return BFA_TRUE;
 
-	bfa_msix_lpu_err(bfa, intr);
+	if (bfa->intr_enabled)
+		bfa_msix_lpu_err(bfa, intr);
 
 	return BFA_TRUE;
 }
@@ -803,11 +804,17 @@ bfa_isr_enable(struct bfa_s *bfa)
 	writel(~umsk, bfa->iocfc.bfa_regs.intr_mask);
 	bfa->iocfc.intr_mask = ~umsk;
 	bfa_isr_mode_set(bfa, bfa->msix.nvecs != 0);
+
+	/*
+	 * Set the flag indicating successful enabling of interrupts
+	 */
+	bfa->intr_enabled = BFA_TRUE;
 }
 
 void
 bfa_isr_disable(struct bfa_s *bfa)
 {
+	bfa->intr_enabled = BFA_FALSE;
 	bfa_isr_mode_set(bfa, BFA_FALSE);
 	writel(-1L, bfa->iocfc.bfa_regs.intr_mask);
 	bfa_msix_uninstall(bfa);
diff --git a/drivers/scsi/bfa/bfa_modules.h b/drivers/scsi/bfa/bfa_modules.h
index 2d36e4823835..189fff71e3c2 100644
--- a/drivers/scsi/bfa/bfa_modules.h
+++ b/drivers/scsi/bfa/bfa_modules.h
@@ -121,6 +121,7 @@ struct bfa_s {
 	bfa_boolean_t		fcs;		/*  FCS is attached to BFA */
 	struct bfa_msix_s	msix;
 	int			bfa_aen_seq;
+	bfa_boolean_t		intr_enabled;	/*  Status of interrupts */
 };
 
 extern bfa_boolean_t bfa_auto_recover;