tree ab438dafb72fca138179a3e00232e23000912a09
parent 9535fff3c5f9382b46f656c46a80bc190645dd32
author Hannes Reinecke <hare@suse.de> 1416839844 +0100
committer Christoph Hellwig <hch@lst.de> 1416841824 +0100

esp_scsi: use FIFO for command submission

Using DMA for command submission has the drawback that it might
generate additional DMA completion interrupts after the command
has been submitted to the device.
Additionally the am53c974 has a design flaw causing it
to generate spurious interrupts even though DMA completion
interrupts are not enabled.
This can be avoided by using the FIFO for command submission.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>