On Mon, Jan 13, 2014 at 07:16:14PM -0800, Joe Perches wrote:
> On Mon, 2014-01-13 at 21:13 -0600, Chase Southwood wrote:
> > This patch for ni_mio_common.c silences a checkpatch error due to a
> > trailing statement.
> []
> > diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c
> []
> > @@ -692,7 +692,8 @@ static void ni_clear_ai_fifo(struct comedi_device *dev)
> > /* 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 */
> > + while (ni_readl(AIFIFO_Status_6143) & 0x10)
> > + ; /* Wait for complete */
>
> It's generally better to use timeouts too.
Just to clarify what Joe is saying do:
/* Wait for complete */
while (timemout < TIMEOUT) {
if (ni_readl(AIFIFO_Status_6143) & 0x10)
break;
udelay(1);
}
I added in a delay... The problem is that you'd probably have to look
at the hardware spec to know what timeout to use or if the delay is
needed.
regards,
dan carpenter
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