ncr5380: Adopt uniform DMA setup convention

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Standardize the DMA setup hooks so that the DMA implementation in
atari_NCR5380.c can be reconciled with pseudo DMA implementation in
NCR5380.c.

Calls to NCR5380_dma_recv_setup() and NCR5380_dma_send_setup() return
a negative value on failure, zero on PDMA transfer success and a positive
byte count for DMA setup success.

This convention is not entirely new, but is now applied consistently.

Also remove a pointless Status Register access: the *phase assignment is
redundant because after NCR5380_transfer_dma() returns control to
NCR5380_information_transfer(), that routine then returns control
to NCR5380_main(), which means *phase is dead.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

This commit is contained in:

Finn Thain 2016-03-23 21:10:18 +11:00 • committed by Martin K. Petersen

parent 6c4b88ca59

commit 438af51c64

4 changed files with 20 additions and 18 deletions

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21

drivers/scsi/NCR5380.c

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10

drivers/scsi/arm/cumana_1.c

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4

drivers/scsi/arm/oak.c

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3

drivers/scsi/atari_scsi.c

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