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Message-ID: <20140727184513.GB29496@kroah.com> Date: Sun, 27 Jul 2014 11:45:13 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: Hartley Sweeten <HartleyS@...ionengravers.com> Cc: Ian Abbott <abbotti@....co.uk>, "driverdev-devel@...uxdriverproject.org" <driverdev-devel@...uxdriverproject.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 1/3] staging: comedi: amplc_dio200_common: prevent extra free_irq() On Fri, Jul 25, 2014 at 06:23:10PM +0000, Hartley Sweeten wrote: > On Friday, July 25, 2014 10:07 AM, Ian Abbott wrote: > > `dio200_detach()` in "amplc_dio200.c" calls > > `amplc_dio200_common_detach()` in "amplc_dio200_common.c", followed by > > `comedi_legacy_detach()` in "../drivers.c". Both of those functions > > call `free_irq()` if `dev->irq` is non-zero. The second call produces a > > warning message because the handler has already been freed. Prevent > > that by setting `dev->irq = 0` in `amplc_dio200_common_detach()`. > > > > Signed-off-by: Ian Abbott <abbotti@....co.uk> > > --- > > drivers/staging/comedi/drivers/amplc_dio200_common.c | 4 +++- > > 1 file changed, 3 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/staging/comedi/drivers/amplc_dio200_common.c b/drivers/staging/comedi/drivers/amplc_dio200_common.c > > index 78700e8..3592e58 100644 > > --- a/drivers/staging/comedi/drivers/amplc_dio200_common.c > > +++ b/drivers/staging/comedi/drivers/amplc_dio200_common.c > > @@ -1202,8 +1202,10 @@ void amplc_dio200_common_detach(struct comedi_device *dev) > > > > if (!thisboard || !devpriv) > > return; > > - if (dev->irq) > > + if (dev->irq) { > > free_irq(dev->irq, dev); > > + dev->irq = 0; > > + } > > } > > EXPORT_SYMBOL_GPL(amplc_dio200_common_detach); > > Ian, > > I have already gave a Reviewed-by signoff for this series. > > After looking over the code I think a cleaner solution would be to: > > 1) Use comedi_legacy_detach() directly for the (*detach) in the > legacy ISA driver. > 2) Move the code from amplc_dio200_common_detach() into the > (*detach) function for the PCI driver. > 3) Remove the exported function amplc_dio200_common_detach(). So should I not apply these patches? confused, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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