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staging: comedi: ni_at_a2150: use cfc_handle_events() 

Use the comedi_fc helper function to automatically call the subdevice
(*cancel) function when needed and call comedi_event().

Also, remove the clearing of the events, comedi_event() does that.

In the Kconfig, COMEDI_NI_AT_A2150 already selects COMEDI_FC.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2014-03-07 17:31:34 -07:00 committed by Greg Kroah-Hartman
parent f21c74fa4c
commit e5bdf51216
1 changed files with 3 additions and 6 deletions
drivers/staging/comedi/drivers
ni_at_a2150.c

9
drivers/staging/comedi/drivers/ni_at_a2150.c
View File

@ -184,7 +184,6 @@ static irqreturn_t a2150_interrupt(int irq, void *d)
}
/* initialize async here to make sure s is not NULL */
async = s->async;
async->events = 0;
cmd = &async->cmd;
status = inw(dev->iobase + STATUS_REG);
@ -196,15 +195,14 @@ static irqreturn_t a2150_interrupt(int irq, void *d)
if (status & OVFL_BIT) {
comedi_error(dev, "fifo overflow");
a2150_cancel(dev, s);
async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
cfc_handle_events(dev, s);
}
if ((status & DMA_TC_BIT) == 0) {
comedi_error(dev, "caught non-dma interrupt? Aborting.");
a2150_cancel(dev, s);
async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
comedi_event(dev, s);
cfc_handle_events(dev, s);
return IRQ_HANDLED;
}
@ -249,7 +247,6 @@ static irqreturn_t a2150_interrupt(int irq, void *d)
cfc_write_to_buffer(s, dpnt);
if (cmd->stop_src == TRIG_COUNT) {
if (--devpriv->count == 0) { /* end of acquisition */
a2150_cancel(dev, s);
async->events |= COMEDI_CB_EOA;
break;
}
@ -265,7 +262,7 @@ static irqreturn_t a2150_interrupt(int irq, void *d)
async->events |= COMEDI_CB_BLOCK;
comedi_event(dev, s);
cfc_handle_events(dev, s);
/* clear interrupt */
outw(0x00, dev->iobase + DMA_TC_CLEAR_REG);