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| author | Tomas Henzl <thenzl@redhat.com> | 2018-05-24 17:12:46 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-06-05 21:24:34 -0400 |
| commit | 10ee1f2206a3f5aa869bede4b7505b24203a7715 (patch) | |
| tree | 5ed66bd6e3cd1b1c72dbbdcaeca178cd891b2c4a /drivers/scsi | |
| parent | 413c2f33489b134e3cc65d9c3ff7861e8fdfe899 (diff) | |
| download | linux-10ee1f2206a3f5aa869bede4b7505b24203a7715.tar.bz2 | |
scsi: mpt3sas: 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>
Acked-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_base.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 61f93a134956..293f04119eba 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -3344,6 +3344,7 @@ _base_mpi_ep_writeq(__u64 b, volatile void __iomem *addr, spin_lock_irqsave(writeq_lock, flags); writel((u32)(data_out), addr); writel((u32)(data_out >> 32), (addr + 4)); + mmiowb(); spin_unlock_irqrestore(writeq_lock, flags); } |