diff options
Diffstat (limited to 'drivers/scsi/g_NCR5380.c')
| -rw-r--r-- | drivers/scsi/g_NCR5380.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c index afd092ff0c2e..5b3e03ad50ce 100644 --- a/drivers/scsi/g_NCR5380.c +++ b/drivers/scsi/g_NCR5380.c @@ -699,6 +699,21 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, ; // TIMEOUT return 0; } + +static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd) +{ + int transfersize = cmd->transfersize; + + /* Limit transfers to 32K, for xx400 & xx406 + * pseudoDMA that transfers in 128 bytes blocks. + */ + if (transfersize > 32 * 1024 && cmd->SCp.this_residual && + !(cmd->SCp.this_residual % transfersize)) + transfersize = 32 * 1024; + + return transfersize; +} + #endif /* PSEUDO_DMA */ /* |