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SubjectRe: [PATCH v2 26/31] staging/comedi/das16: Make timer initialization unconditional
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On 21/09/17 00:27, Kees Cook wrote:
> With timer initialization made unconditional, there is no reason to
> make del_timer_sync() calls conditionally, there by removing the test
> of the .data field.
>
> Cc: Ian Abbott <abbotti@mev.co.uk>
> Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: devel@driverdev.osuosl.org
> Signed-off-by: Kees Cook <keescook@chromium.org>
> ---
> drivers/staging/comedi/drivers/das16.c | 10 ++++------
> 1 file changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/staging/comedi/drivers/das16.c b/drivers/staging/comedi/drivers/das16.c
> index 5d157951f63f..2b2a446af3f5 100644
> --- a/drivers/staging/comedi/drivers/das16.c
> +++ b/drivers/staging/comedi/drivers/das16.c
> @@ -934,6 +934,9 @@ static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan)
> {
> struct das16_private_struct *devpriv = dev->private;
>
> + setup_timer(&devpriv->timer, das16_timer_interrupt,
> + (unsigned long)dev);
> +
> /* only DMA channels 3 and 1 are valid */
> if (!(dma_chan == 1 || dma_chan == 3))
> return;
> @@ -941,10 +944,6 @@ static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan)
> /* DMA uses two buffers */
> devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan,
> DAS16_DMA_SIZE, COMEDI_ISADMA_READ);
> - if (devpriv->dma) {
> - setup_timer(&devpriv->timer, das16_timer_interrupt,
> - (unsigned long)dev);
> - }
> }
>
> static void das16_free_dma(struct comedi_device *dev)
> @@ -952,8 +951,7 @@ static void das16_free_dma(struct comedi_device *dev)
> struct das16_private_struct *devpriv = dev->private;
>
> if (devpriv) {
> - if (devpriv->timer.data)
> - del_timer_sync(&devpriv->timer);
> + del_timer_sync(&devpriv->timer);
> comedi_isadma_free(devpriv->dma);
> }
> }
>

That's fine.

Reviewed-by: Ian Abbott <abbotti@mev.co.uk>

--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@mev.co.uk> )=-
-=( Web: http://www.mev.co.uk/ )=-

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