diff options
Diffstat (limited to 'sys/dev/ata/ata-lowlevel.c')
| -rw-r--r-- | sys/dev/ata/ata-lowlevel.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/sys/dev/ata/ata-lowlevel.c b/sys/dev/ata/ata-lowlevel.c index 566b8f676a59..6c196d60a442 100644 --- a/sys/dev/ata/ata-lowlevel.c +++ b/sys/dev/ata/ata-lowlevel.c @@ -141,6 +141,14 @@ ata_begin_transaction(struct ata_request *request) goto begin_finished; } + /* start DMA engine if necessary */ + if ((ch->flags & ATA_DMA_BEFORE_CMD) && + ch->dma.start && ch->dma.start(request)) { + device_printf(request->parent, "error starting DMA\n"); + request->result = EIO; + goto begin_finished; + } + /* issue command */ if (ch->hw.command(request)) { device_printf(request->parent, "error issuing %s command\n", @@ -150,7 +158,8 @@ ata_begin_transaction(struct ata_request *request) } /* start DMA engine */ - if (ch->dma.start && ch->dma.start(request)) { + if (!(ch->flags & ATA_DMA_BEFORE_CMD) && + ch->dma.start && ch->dma.start(request)) { device_printf(request->parent, "error starting DMA\n"); request->result = EIO; goto begin_finished; |