atari_NCR5380: Remove DMA_MIN_SIZE macro
Only the atari_scsi and sun3_scsi drivers define DMA_MIN_SIZE.
Both drivers also define NCR5380_dma_xfer_len, which means
DMA_MIN_SIZE can be removed from the core driver.
This removes another discrepancy between the two core drivers.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/atari_scsi.c b/drivers/scsi/atari_scsi.c
index c68e895..41ddd95 100644
--- a/drivers/scsi/atari_scsi.c
+++ b/drivers/scsi/atari_scsi.c
@@ -83,11 +83,12 @@
#include <scsi/scsi_host.h>
+#define DMA_MIN_SIZE 32
+
/* Definitions for the core NCR5380 driver. */
#define SUPPORT_TAGS
#define MAX_TAGS 32
-#define DMA_MIN_SIZE 32
#define NCR5380_implementation_fields /* none */
@@ -605,6 +606,9 @@
{
unsigned long possible_len, limit;
+ if (wanted_len < DMA_MIN_SIZE)
+ return 0;
+
if (IS_A_TT())
/* TT SCSI DMA can transfer arbitrary #bytes */
return wanted_len;
