[SCSI] hpsa: add readl after writel in interrupt mask setting code

This is to ensure the board interrupts are really off when
these functions return.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
index 98c97ca21223..7eec39716dc7 100644
--- a/drivers/scsi/hpsa.h
+++ b/drivers/scsi/hpsa.h
@@ -228,10 +228,12 @@ static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
         if (val) { /* Turn interrupts on */
                 h->interrupts_enabled = 1;
                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+                (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
         } else { /* Turn them off */
                 h->interrupts_enabled = 0;
                 writel(SA5_INTR_OFF,
                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+                (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
         }
 }
 
@@ -240,10 +242,12 @@ static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
         if (val) { /* turn on interrupts */
                 h->interrupts_enabled = 1;
                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+                (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
         } else {
                 h->interrupts_enabled = 0;
                 writel(SA5_PERF_INTR_OFF,
                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+                (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
         }
 }