On 2014-07-27 19:45, Greg Kroah-Hartman wrote:
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@xxxxxxxxx>
---
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
It fixes a bug (harmless, apart from a kernel warning), and does no
harm, so might as well apply them. Hartley's suggestion can be done later.
--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=-
-=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=-
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