megaraid_sas: disable interrupt_mask before enabling hardware interrupts

Update driver "mask_interrupts" before enable/disable hardware interrupt
in order to avoid missing interrupts because of "mask_interrupts" still
set to 1 and hardware interrupts are enabled.

Cc: <stable@vger.kernel.org>
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 7b23d347b69c..075c99e987bf 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -102,6 +102,8 @@ megasas_enable_intr_fusion(struct megasas_instance *instance)
 {
         struct megasas_register_set __iomem *regs;
         regs = instance->reg_set;
+
+        instance->mask_interrupts = 0;
         /* For Thunderbolt/Invader also clear intr on enable */
         writel(~0, &regs->outbound_intr_status);
         readl(&regs->outbound_intr_status);
@@ -110,7 +112,6 @@ megasas_enable_intr_fusion(struct megasas_instance *instance)
 
         /* Dummy readl to force pci flush */
         readl(&regs->outbound_intr_mask);
-        instance->mask_interrupts = 0;
 }
 
 /**