1 files changed, 10 insertions, 12 deletions

diff --git a/drivers/staging/comedi/drivers/comedi_fc.c b/drivers/staging/comedi/drivers/comedi_fc.c
index 9d9b1469e89a..c33c3e5680a6 100644
--- a/drivers/staging/comedi/drivers/comedi_fc.c
+++ b/drivers/staging/comedi/drivers/comedi_fc.c
@@ -24,7 +24,7 @@
 
 unsigned int cfc_bytes_per_scan(struct comedi_subdevice *s)
 {
-	unsigned int chanlist_len = s->async->cmd.chanlist_len;
+	struct comedi_cmd *cmd = &s->async->cmd;
 	unsigned int num_samples;
 	unsigned int bits_per_sample;
 
@@ -33,11 +33,11 @@ unsigned int cfc_bytes_per_scan(struct comedi_subdevice *s)
 	case COMEDI_SUBD_DO:
 	case COMEDI_SUBD_DIO:
 		bits_per_sample = 8 * bytes_per_sample(s);
-		num_samples = (chanlist_len + bits_per_sample - 1) /
+		num_samples = (cmd->chanlist_len + bits_per_sample - 1) /
 				bits_per_sample;
 		break;
 	default:
-		num_samples = chanlist_len;
+		num_samples = cmd->chanlist_len;
 		break;
 	}
 	return num_samples * bytes_per_sample(s);
@@ -67,15 +67,15 @@ unsigned int cfc_write_array_to_buffer(struct comedi_subdevice *s,
 	if (num_bytes == 0)
 		return 0;
 
-	retval = comedi_buf_write_alloc(async, num_bytes);
+	retval = comedi_buf_write_alloc(s, num_bytes);
 	if (retval != num_bytes) {
 		dev_warn(s->device->class_dev, "buffer overrun\n");
 		async->events |= COMEDI_CB_OVERFLOW;
 		return 0;
 	}
 
-	comedi_buf_memcpy_to(async, 0, data, num_bytes);
-	comedi_buf_write_free(async, num_bytes);
+	comedi_buf_memcpy_to(s, 0, data, num_bytes);
+	comedi_buf_write_free(s, num_bytes);
 	cfc_inc_scan_progress(s, num_bytes);
 	async->events |= COMEDI_CB_BLOCK;
 
@@ -86,16 +86,14 @@ EXPORT_SYMBOL_GPL(cfc_write_array_to_buffer);
 unsigned int cfc_read_array_from_buffer(struct comedi_subdevice *s,
 					void *data, unsigned int num_bytes)
 {
-	struct comedi_async *async = s->async;
-
 	if (num_bytes == 0)
 		return 0;
 
-	num_bytes = comedi_buf_read_alloc(async, num_bytes);
-	comedi_buf_memcpy_from(async, 0, data, num_bytes);
-	comedi_buf_read_free(async, num_bytes);
+	num_bytes = comedi_buf_read_alloc(s, num_bytes);
+	comedi_buf_memcpy_from(s, 0, data, num_bytes);
+	comedi_buf_read_free(s, num_bytes);
 	cfc_inc_scan_progress(s, num_bytes);
-	async->events |= COMEDI_CB_BLOCK;
+	s->async->events |= COMEDI_CB_BLOCK;
 
 	return num_bytes;
 }