cciss: 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: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 554bbd907d14..9b494392e5d5 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -239,11 +239,13 @@ static void SA5_intr_mask(ctlr_info_t *h, unsigned long 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);
         }
 }
 /*
@@ -257,11 +259,13 @@ static void SA5B_intr_mask(ctlr_info_t *h, unsigned long 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( SA5B_INTR_OFF,
                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+                (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
         }
 }
 
@@ -271,10 +275,12 @@ static void SA5_performant_intr_mask(ctlr_info_t *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);
         }
 }