A barrier should be added to ensure proper
ordering of memory mapped writes.
V2: - added the barrier also to megasas_fire_cmd_skinny,
as suggested by Kashyap Desai
Signed-off-by: Tomas Henzl <the...@redhat.com>
---
drivers/scsi/megaraid/megaraid_sas_base.c | 1 +
drivers/scsi/megaraid/megaraid_sas_fusion.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c
b/drivers/scsi/megaraid/megaraid_sas_base.c
index cc92c8198d..9f7689515c 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -749,6 +749,7 @@ megasas_fire_cmd_skinny(struct megasas_instance *instance,
&(regs)->inbound_high_queue_port);
writel((lower_32_bits(frame_phys_addr) | (frame_count<<1))|1,
&(regs)->inbound_low_queue_port);
+ mmiowb();
spin_unlock_irqrestore(&instance->hba_lock, flags);
}
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c
b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index d9d0029fb1..98a848bdfd 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -204,6 +204,7 @@ megasas_fire_cmd_fusion(struct megasas_instance *instance,
&instance->reg_set->inbound_low_queue_port);
writel(le32_to_cpu(req_desc->u.high),
&instance->reg_set->inbound_high_queue_port);
+ mmiowb();
spin_unlock_irqrestore(&instance->hba_lock, flags);
#endif
}
--
2.4.3
--
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