Re: [PATCH 1/2] dmaengine: at_hdmac: use tasklet_kill in teardown

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On Thu, Mar 06, 2014 at 12:26:38PM +0100, Thomas Gleixner wrote:
> 
> 
> On Thu, 6 Mar 2014, Vinod Koul wrote:
> 
> > As discussed in [1] the tasklet_disable is not a proper function for teardown.
> > The driver also uses correct method of tasklet_kill. So remove tasklet_disable
> > 
> > [1]: http://lwn.net/Articles/588457/
> > 
> > Reported-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> > Signed-off-by: Vinod Koul <vinod.koul@xxxxxxxxx>
> > ---
> >  drivers/dma/at_hdmac.c |    1 -
> >  1 files changed, 0 insertions(+), 1 deletions(-)
> > 
> > diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
> > index e2c04dc..c13a3bb 100644
> > --- a/drivers/dma/at_hdmac.c
> > +++ b/drivers/dma/at_hdmac.c
> > @@ -1569,7 +1569,6 @@ static int at_dma_remove(struct platform_device *pdev)
> >  
> >  		/* Disable interrupts */
> >  		atc_disable_chan_irq(atdma, chan->chan_id);
> > -		tasklet_disable(&atchan->tasklet);
> >  
> >  		tasklet_kill(&atchan->tasklet);
> >  		list_del(&chan->device_node);
> 
> So you disable the irq at the device level, but what makes sure that
> the last interrupt on that line has completed and no further
> scheduling of the tasklet can happen? See [1] :)
Yes I missed that will fix in v2

-- 
~Vinod
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