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Commit 10ee1f22 authored by Tomas Henzl's avatar Tomas Henzl Committed by Martin K. Petersen
Browse files

scsi: mpt3sas: Add an I/O barrier 



A barrier should be added to ensure proper ordering of memory mapped
writes.

Signed-off-by: default avatarTomas Henzl <thenzl@redhat.com>
Acked-by: default avatarChaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 413c2f33

drivers/scsi/mpt3sas/mpt3sas_base.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

}