On Mon, May 28, 2018 at 09:27:18PM +0200, Auger Eric wrote:
> Hi Dan,
>
> On 05/28/2018 09:47 AM, Dan Carpenter wrote:
> > This cast is confusing... The "start" variable is an unsigned int. We
> > absolutely do not want to cast it to a negative int so why is the cast
> > there? It turns out, when you look at the context, it's a no-op and we
> > can just remove it.
> >
> > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> >
> > diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
> > index 1c46045b0e7f..2724fed62129 100644
> > --- a/drivers/vfio/pci/vfio_pci_intrs.c
> > +++ b/drivers/vfio/pci/vfio_pci_intrs.c
> > @@ -368,7 +368,7 @@ static int vfio_msi_set_block(struct vfio_pci_device *vdev, unsigned start,
> > }
> >
> > if (ret) {
> > - for (--j; j >= (int)start; j--)
> > + for (--j; j >= start; j--)
> I think this was done one purpose as j can be -1 while start is an
> unsigned.
>
Oh, wow... Yeah. Sorry. I didn't think that through. I will create
a static checker warning so this particular bug doesn't happen to me
again.
regards,
dan carpenter
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