On Wednesday, January 15, 2014 10:52 AM, Chase Southwood wrote:
> This patch for ni_mio_common.c changes out a while loop for a timeout,
> which is preferred.
>
> Signed-off-by: Chase Southwood <chase.southwood@xxxxxxxxx>
> ---
>
> 2: Changed from simple clean-up to swapping a timeout in for a while loop.
>
> 3: Removed extra counter variable, and added error checking.
>
> 4: No longer using counter variable, using jiffies instead.
>
> 5: udelay for 10u, instead of 1u.
>
> 6: Scrap udelay entirely, in favor of cpu_relax. Include asm/processor.h
> in order to use cpu_relax.
>
> drivers/staging/comedi/drivers/ni_mio_common.c | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c
> index 457b884..fe2f434 100644
> --- a/drivers/staging/comedi/drivers/ni_mio_common.c
> +++ b/drivers/staging/comedi/drivers/ni_mio_common.c
> @@ -55,6 +55,7 @@
> #include <linux/interrupt.h>
> #include <linux/sched.h>
> #include <linux/delay.h>
> +#include <asm/processor.h>
> #include "8255.h"
> #include "mite.h"
> #include "comedi_fc.h"
> @@ -687,12 +688,21 @@ static void ni_clear_ai_fifo(struct comedi_device *dev)
> {
> const struct ni_board_struct *board = comedi_board(dev);
> struct ni_private *devpriv = dev->private;
> + unsigned long timeout;
>
> if (board->reg_type == ni_reg_6143) {
> /* Flush the 6143 data FIFO */
> ni_writel(0x10, AIFIFO_Control_6143); /* Flush fifo */
> ni_writel(0x00, AIFIFO_Control_6143); /* Flush fifo */
> - while (ni_readl(AIFIFO_Status_6143) & 0x10) ; /* Wait for complete */
> + /* Wait for complete */
> + timeout = jiffies + msec_to_jiffies(500);
Did you build this?
I think you meant to use msecs_to_jiffies().
Regards,
Hartley
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