diff options
Diffstat (limited to 'drivers/scsi/NCR5380.c')
| -rw-r--r-- | drivers/scsi/NCR5380.c | 34 |
1 files changed, 6 insertions, 28 deletions
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index 6a030139b41f..91eac63b5239 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -201,11 +201,6 @@ * DONT_USE_INTR - if defined, never use interrupts, even if we probe or * override-configure an IRQ. * - * LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512 - * bytes at a time. Since interrupts are disabled by default during - * these transfers, we might need this to give reasonable interrupt - * service time if the transfer size gets too large. - * * LINKED - if defined, linked commands are supported. * * PSEUDO_DMA - if defined, PSEUDO DMA is used during the data transfer phases. @@ -2000,29 +1995,12 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { */ #if defined(PSEUDO_DMA) || defined(REAL_DMA_POLL) - /* KLL - * PSEUDO_DMA is defined here. If this is the g_NCR5380 - * driver then it will always be defined, so the - * FLAG_NO_PSEUDO_DMA is used to inhibit PDMA in the base - * NCR5380 case. I think this is a fairly clean solution. - * We supplement these 2 if's with the flag. - */ -#ifdef NCR5380_dma_xfer_len - if (!cmd->device->borken && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && (transfersize = NCR5380_dma_xfer_len(instance, cmd)) != 0) { -#else - transfersize = cmd->transfersize; - -#ifdef LIMIT_TRANSFERSIZE /* If we have problems with interrupt service */ - if (transfersize > 512) - transfersize = 512; -#endif /* LIMIT_TRANSFERSIZE */ - - if (!cmd->device->borken && transfersize && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && cmd->SCp.this_residual && !(cmd->SCp.this_residual % transfersize)) { - /* Limit transfers to 32K, for xx400 & xx406 - * pseudoDMA that transfers in 128 bytes blocks. */ - if (transfersize > 32 * 1024) - transfersize = 32 * 1024; -#endif + transfersize = 0; + if (!cmd->device->borken && + !(hostdata->flags & FLAG_NO_PSEUDO_DMA)) + transfersize = NCR5380_dma_xfer_len(instance, cmd, phase); + + if (transfersize) { len = transfersize; if (NCR5380_transfer_dma(instance, &phase, &len, (unsigned char **) &cmd->SCp.ptr)) { /* |