tree 8511f8a42a0b58e587c22f0288b1f1b5c7c2d81b
parent eeea2f9c2f2ecc5f3217edcacc95817047b143c2
author Paolo Bonzini <pbonzini@redhat.com> 1416839848 +0100
committer Christoph Hellwig <hch@lst.de> 1416841997 +0100

esp_scsi: let DMA driver provide a config2 value

On PCscsi, the FENAB configuration also enables 24-bit DMA
transfer lengths (and provides the chip id in TCHI after reset).
We want to be able to enable this parameter from the DMA driver.

Check if the caller of scsi_esp_register provided a value for esp->config2.
If this is the case, assume this is not an ESP100, skip the detection
phase and leave esp->config2 untouched.  It will be used in esp_reset_esp.

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