[SCSI] megaraid_sas: add readl to force PCI posting flush
MegaRAID SAS Driver get unexpected Interrupt. Add the dummy readl to force PCI flush will fix this issue. Signed-off-by: NBo Yang <bo.yang@lsi.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Cc: Stable Tree <stable@kernel.org> Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>
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