staging: comedi: drivers should not clear the async->events

The comedi core resets the async->events in comedi_buf_reset() which is
called when the subdevice is restored to an idle state and at the start
of an async command. The async->events are also cleared after handling
the events in comedi_event().

Drivers should not clear the events manually.
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>

drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c

@@ -1574,8 +1574,6 @@ static int i_APCI3120_InterruptHandleEos(struct comedi_device *dev)
 
 	n_chan = devpriv->ui_AiNbrofChannels;
 
-	s->async->events = 0;
-
 	for (i = 0; i < n_chan; i++)
 		err &= comedi_buf_put(s->async, inw(dev->iobase + 0));
 

drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c

@@ -2619,7 +2619,6 @@ static int i_APCI3200_InterruptHandleEos(struct comedi_device *dev)
 		/* BEGIN JK 18.10.2004: APCI-3200 Driver update 0.7.57 -> 0.7.68 */
 		/* This value is not used */
 		/* ui_ChannelNumber = inl(devpriv->iobase+s_BoardInfos [dev->minor].i_Offset + 24); */
-		s->async->events = 0;
 		/* END JK 18.10.2004: APCI-3200 Driver update 0.7.57 -> 0.7.68 */
 
       /*************************************/

drivers/staging/comedi/drivers/adl_pci9118.c

@@ -955,8 +955,6 @@ static void interrupt_pci9118_ai_onesample(struct comedi_device *dev,
 	struct pci9118_private *devpriv = dev->private;
 	unsigned short sampl;
 
-	s->async->events = 0;
-
 	if (int_adstat & devpriv->ai_maskerr)
 		if (pci9118_decode_error_status(dev, s, int_adstat))
 			return;

drivers/staging/comedi/drivers/comedi_test.c

@@ -185,7 +185,6 @@ static void waveform_ai_interrupt(unsigned long arg)
 	    (devpriv->usec_remainder + elapsed_time) / devpriv->scan_period;
 	devpriv->usec_remainder =
 	    (devpriv->usec_remainder + elapsed_time) % devpriv->scan_period;
-	async->events = 0;
 
 	if (cmd->stop_src == TRIG_COUNT) {
 		unsigned int remaining = cmd->stop_arg - devpriv->ai_count;

drivers/staging/comedi/drivers/das16m1.c

@@ -416,7 +416,6 @@ static void das16m1_handler(struct comedi_device *dev, unsigned int status)
 
 	s = dev->read_subdev;
 	async = s->async;
-	async->events = 0;
 	cmd = &async->cmd;
 
 	/*  figure out how many samples are in fifo */

drivers/staging/comedi/drivers/das1800.c

@@ -646,7 +646,6 @@ static void das1800_ai_handler(struct comedi_device *dev)
 	struct comedi_cmd *cmd = &async->cmd;
 	unsigned int status = inb(dev->iobase + DAS1800_STATUS);
 
-	async->events = 0;
 	/*  select adc for base address + 0 */
 	outb(ADC, dev->iobase + DAS1800_SELECT);
 	/*  dma buffer full */

drivers/staging/comedi/drivers/das800.c

@@ -448,7 +448,6 @@ static int das800_ai_do_cmd(struct comedi_device *dev,
 	das800_ind_write(dev, conv_bits, CONV_CONTROL);
 	spin_unlock_irqrestore(&dev->spinlock, irq_flags);
 
-	async->events = 0;
 	das800_enable(dev);
 	return 0;
 }

drivers/staging/comedi/drivers/gsc_hpdi.c

@@ -746,8 +746,6 @@ static irqreturn_t handle_interrupt(int irq, void *d)
 	hpdi_intr_status = readl(devpriv->hpdi_iobase + INTERRUPT_STATUS_REG);
 	hpdi_board_status = readl(devpriv->hpdi_iobase + BOARD_STATUS_REG);
 
-	async->events = 0;
-
 	if (hpdi_intr_status) {
 		writel(hpdi_intr_status,
 		       devpriv->hpdi_iobase + INTERRUPT_STATUS_REG);

drivers/staging/comedi/drivers/me4000.c

@@ -1112,9 +1112,6 @@ static irqreturn_t me4000_ai_isr(int irq, void *dev_id)
 	if (!dev->attached)
 		return IRQ_NONE;
 
-	/* Reset all events */
-	s->async->events = 0;
-
 	if (inl(dev->iobase + ME4000_IRQ_STATUS_REG) &
 	    ME4000_IRQ_STATUS_BIT_AI_HF) {
 		/* Read status register to find out what happened */