commit c2ced1719a1b903350955a511e1666e6d05a7f5b
author Sumit.Saxena@avagotech.com <Sumit.Saxena@avagotech.com> Mon Jan 05 20:06:13 2015 +0530
committer Christoph Hellwig <hch@lst.de> Fri Jan 09 15:44:35 2015 +0100
tree c52f515175715b6cbf9d327795da02509dc34271
parent ab2f0608e16d64a23a2dcc8d83b966a0e0a281f3

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>

drivers/scsi/megaraid/megaraid_sas_fusion.c

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 7b23d34..075c99e 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -102,6 +102,8 @@
 {
 	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 @@
 
 	/* Dummy readl to force pci flush */
 	readl(&regs->outbound_intr_mask);
-	instance->mask_interrupts = 0;
 }
 
 /**