Re: [PATCH] ipack: tpci200: change pci_iounmap to iounmap

[Dongliang Mu]

On Fri, Aug 27, 2021 at 10:25 PM Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Fri, Aug 27, 2021 at 06:33:46PM +0800, Dongliang Mu wrote:
> > On Fri, Aug 27, 2021 at 6:00 PM Greg Kroah-Hartman
> > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > >
> > > On Fri, Aug 27, 2021 at 05:43:47PM +0800, Dongliang Mu wrote:
> > > > The deallocation api for ioremap should be iounmap, other than
> > > > pci_iounmap.
> > >
> > > why?
> >
> > Because the tpci200->info->cfg_regs/interface_regs is allocated by
> > ioremap. From my understanding, ioremap and iounmap are in pairs,
> > other than pci_iounmap.
> > See the code below.
> >
> > tpci200->info->interface_regs =
> > ioremap(pci_resource_start(tpci200->info->pdev,
> >   TPCI200_IP_INTERFACE_BAR),
> > TPCI200_IFACE_SIZE);
> >
> > https://elixir.bootlin.com/linux/latest/source/drivers/ipack/carriers/tpci200.c#L297
> >
> > tpci200->info->cfg_regs = ioremap(
> > pci_resource_start(pdev, TPCI200_CFG_MEM_BAR),
> > pci_resource_len(pdev, TPCI200_CFG_MEM_BAR));
> >
> > https://elixir.bootlin.com/linux/latest/source/drivers/ipack/carriers/tpci200.c#L546
> >
> > If there is any issue, please let me know
>
> The point is that the driver should be calling pci_iomap_bar() instead
> of ioremap(), and then the call to pci_ioumap() is correct here.
>
> Please make that change instead.

No problem. I will modify the patch and send a v2 patch afterwards.

>
> thanks,
>
> greg k-h