[PATCH 3.14 23/73] megaraid_sas: disable interrupt_mask before enabling hardware interrupts

[Greg Kroah-Hartman]

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "sumit.sax...@avagotech.com" <sumit.sax...@avagotech.com>

commit c2ced1719a1b903350955a511e1666e6d05a7f5b upstream.

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.

Signed-off-by: Sumit Saxena <sumit.sax...@avagotech.com>
Signed-off-by: Chaitra Basappa <chaitra.basa...@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.peter...@oracle.com>
Signed-off-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/scsi/megaraid/megaraid_sas_fusion.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -92,6 +92,8 @@ megasas_enable_intr_fusion(struct megasa
 {
        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);
@@ -100,7 +102,6 @@ megasas_enable_intr_fusion(struct megasa
 
        /* Dummy readl to force pci flush */
        readl(&regs->outbound_intr_mask);
-       instance->mask_interrupts = 0;
 }
 
 /**


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