diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/mite.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/mite.c | 38 |
1 files changed, 18 insertions, 20 deletions
diff --git a/drivers/staging/comedi/drivers/mite.c b/drivers/staging/comedi/drivers/mite.c index 1a572c83f996..19c029acbc99 100644 --- a/drivers/staging/comedi/drivers/mite.c +++ b/drivers/staging/comedi/drivers/mite.c @@ -307,8 +307,9 @@ EXPORT_SYMBOL_GPL(mite_dma_arm); /**************************************/ int mite_buf_change(struct mite_dma_descriptor_ring *ring, - struct comedi_async *async) + struct comedi_subdevice *s) { + struct comedi_async *async = s->async; unsigned int n_links; int i; @@ -333,7 +334,7 @@ int mite_buf_change(struct mite_dma_descriptor_ring *ring, n_links * sizeof(struct mite_dma_descriptor), &ring->descriptors_dma_addr, GFP_KERNEL); if (!ring->descriptors) { - dev_err(async->subdevice->device->class_dev, + dev_err(s->device->class_dev, "mite: ring buffer allocation failed\n"); return -ENOMEM; } @@ -525,15 +526,15 @@ void mite_dma_disarm(struct mite_channel *mite_chan) EXPORT_SYMBOL_GPL(mite_dma_disarm); int mite_sync_input_dma(struct mite_channel *mite_chan, - struct comedi_async *async) + struct comedi_subdevice *s) { - struct comedi_subdevice *s = async->subdevice; + struct comedi_async *async = s->async; int count; unsigned int nbytes, old_alloc_count; old_alloc_count = async->buf_write_alloc_count; /* write alloc as much as we can */ - comedi_buf_write_alloc(async, async->prealloc_bufsz); + comedi_buf_write_alloc(s, async->prealloc_bufsz); nbytes = mite_bytes_written_to_memory_lb(mite_chan); if ((int)(mite_bytes_written_to_memory_ub(mite_chan) - @@ -550,7 +551,7 @@ int mite_sync_input_dma(struct mite_channel *mite_chan, if (count <= 0) return 0; - comedi_buf_write_free(async, count); + comedi_buf_write_free(s, count); cfc_inc_scan_progress(s, count); async->events |= COMEDI_CB_BLOCK; return 0; @@ -558,28 +559,25 @@ int mite_sync_input_dma(struct mite_channel *mite_chan, EXPORT_SYMBOL_GPL(mite_sync_input_dma); int mite_sync_output_dma(struct mite_channel *mite_chan, - struct comedi_async *async) + struct comedi_subdevice *s) { - int count; + struct comedi_async *async = s->async; + struct comedi_cmd *cmd = &async->cmd; + u32 stop_count = cmd->stop_arg * cfc_bytes_per_scan(s); + unsigned int old_alloc_count = async->buf_read_alloc_count; u32 nbytes_ub, nbytes_lb; - unsigned int old_alloc_count; - u32 stop_count = - async->cmd.stop_arg * cfc_bytes_per_scan(async->subdevice); + int count; - old_alloc_count = async->buf_read_alloc_count; /* read alloc as much as we can */ - comedi_buf_read_alloc(async, async->prealloc_bufsz); + comedi_buf_read_alloc(s, async->prealloc_bufsz); nbytes_lb = mite_bytes_read_from_memory_lb(mite_chan); - if (async->cmd.stop_src == TRIG_COUNT && - (int)(nbytes_lb - stop_count) > 0) + if (cmd->stop_src == TRIG_COUNT && (int)(nbytes_lb - stop_count) > 0) nbytes_lb = stop_count; nbytes_ub = mite_bytes_read_from_memory_ub(mite_chan); - if (async->cmd.stop_src == TRIG_COUNT && - (int)(nbytes_ub - stop_count) > 0) + if (cmd->stop_src == TRIG_COUNT && (int)(nbytes_ub - stop_count) > 0) nbytes_ub = stop_count; if ((int)(nbytes_ub - old_alloc_count) > 0) { - dev_warn(async->subdevice->device->class_dev, - "mite: DMA underrun\n"); + dev_warn(s->device->class_dev, "mite: DMA underrun\n"); async->events |= COMEDI_CB_OVERFLOW; return -1; } @@ -588,7 +586,7 @@ int mite_sync_output_dma(struct mite_channel *mite_chan, return 0; if (count) { - comedi_buf_read_free(async, count); + comedi_buf_read_free(s, count); async->events |= COMEDI_CB_BLOCK; } return 0; |