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| author | Tomas Henzl <thenzl@redhat.com> | 2016-02-01 15:12:04 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-02-23 21:27:02 -0500 |
| commit | b99dbe56d511eb07de33bfa1b99ac5a6ff76ae08 (patch) | |
| tree | 8d50a685eac3782317ad1b05e0eaa29771046436 /drivers/scsi/megaraid | |
| parent | 19db2307365231e798bb99324ed553bcada57913 (diff) | |
| download | linux-b99dbe56d511eb07de33bfa1b99ac5a6ff76ae08.tar.gz linux-b99dbe56d511eb07de33bfa1b99ac5a6ff76ae08.tar.bz2 linux-b99dbe56d511eb07de33bfa1b99ac5a6ff76ae08.zip | |
megaraid_sas: Add an i/o barrier
A barrier should be added to ensure proper ordering of memory mapped
writes.
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Kashyap Desai <kashyap.desai@broadcom.com>
Acked-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/megaraid')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_base.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_fusion.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index e0b4ca1c57e1..5c08568ccfbf 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 d9d0029fb1b0..98a848bdfdc2 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 } |