Use comedi_buf_write_samples() to add the sample to the async buffer.
The async events will set properly by the core. A dev_warn() message will
also be output by the core if the buffer overflows. Remove the unnecessary
events and dev_err() message in the driver.
The core will also add the COMEDI_CB_BLOCK event when data is written to
the async buffer. Remove the unnecessary event in the driver.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/amplc_pci230.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/staging/comedi/drivers/amplc_pci230.c
b/drivers/staging/comedi/drivers/amplc_pci230.c
index f9b952f..44c967f 100644
--- a/drivers/staging/comedi/drivers/amplc_pci230.c
+++ b/drivers/staging/comedi/drivers/amplc_pci230.c
@@ -2053,6 +2053,7 @@ static void pci230_handle_ai(struct comedi_device *dev,
unsigned int i;
unsigned int todo;
unsigned int fifoamount;
+ unsigned short val;
/* Determine number of samples to read. */
if (cmd->stop_src != TRIG_COUNT) {
@@ -2099,12 +2100,10 @@ static void pci230_handle_ai(struct comedi_device *dev,
fifoamount = 1;
}
}
- /* Read sample and store in Comedi's circular buffer. */
- if (comedi_buf_put(s, pci230_ai_read(dev)) == 0) {
- events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW;
- dev_err(dev->class_dev, "AI buffer overflow\n");
- break;
- }
+
+ val = pci230_ai_read(dev);
+ comedi_buf_write_samples(s, &val, 1);
+
fifoamount--;
devpriv->ai_scan_pos++;
if (devpriv->ai_scan_pos == scanlen) {
@@ -2117,9 +2116,6 @@ static void pci230_handle_ai(struct comedi_device *dev,
if (cmd->stop_src == TRIG_COUNT && devpriv->ai_scan_count == 0) {
/* End of acquisition. */
events |= COMEDI_CB_EOA;
- } else {
- /* More samples required, tell Comedi to block. */
- events |= COMEDI_CB_BLOCK;
}
async->events |= events;
if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
--
2.0.3
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