[PATCH 4/8] megaraid_sas : Disable interrupt_mask before enabling hardware interrupts

Sumit.Saxena
2015-01-05T14:36:13Z

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>
---
drivers/scsi/megaraid/megaraid_sas_fusion.c | 3 ++-
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 fe60743..a703c86 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;
}

/**
--
1.7.3