On Fri, 15 Nov 2024, Bjorn Helgaas wrote:
> On Fri, Nov 15, 2024 at 06:57:17PM +0200, Ilpo Järvinen wrote:
> > bwctrl cannot use IRQF_ONESHOT because it shares interrupt with other
> > service drivers that are not using IRQF_ONESHOT nor compatible with it.
> >
> > Remove IRQF_ONESHOT from bwctrl and convert the irq thread to hardirq
> > handler. Rename the handler to pcie_bwnotif_irq() to indicate its new
> > purpose.
> >
> > The IRQ handler is simple enough to not require not require other
> > changes.
> >
> > Fixes: 058a4cb11620 ("PCI/bwctrl: Re-add BW notification portdrv as PCIe BW controller")
> > Reported-by: Stefan Wahren <wahrenst@xxxxxxx>
> > Link: https://lore.kernel.org/linux-pci/dcd660fd-a265-4f47-8696-776a85e097a0@xxxxxxx/
> > Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
>
> Squashed into 058a4cb11620, thanks!
>
> Also added your tested-by, Stefan, thanks very much for doing that!
Hi Bjorn,
You might want to also remove "3) ..." part from the commit message as it
still refers to threaded IRQ and IRQF_ONESHOT so it won't confuse anybody
when looking at this years from now :-).
--
i.
> > ---
> > drivers/pci/pcie/bwctrl.c | 8 +++-----
> > 1 file changed, 3 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/pci/pcie/bwctrl.c b/drivers/pci/pcie/bwctrl.c
> > index ff5d12e01f9c..a6c65bbe3735 100644
> > --- a/drivers/pci/pcie/bwctrl.c
> > +++ b/drivers/pci/pcie/bwctrl.c
> > @@ -230,7 +230,7 @@ static void pcie_bwnotif_disable(struct pci_dev *port)
> > PCI_EXP_LNKCTL_LBMIE | PCI_EXP_LNKCTL_LABIE);
> > }
> >
> > -static irqreturn_t pcie_bwnotif_irq_thread(int irq, void *context)
> > +static irqreturn_t pcie_bwnotif_irq(int irq, void *context)
> > {
> > struct pcie_device *srv = context;
> > struct pcie_bwctrl_data *data = srv->port->link_bwctrl;
> > @@ -302,10 +302,8 @@ static int pcie_bwnotif_probe(struct pcie_device *srv)
> > if (ret)
> > return ret;
> >
> > - ret = devm_request_threaded_irq(&srv->device, srv->irq, NULL,
> > - pcie_bwnotif_irq_thread,
> > - IRQF_SHARED | IRQF_ONESHOT,
> > - "PCIe bwctrl", srv);
> > + ret = devm_request_irq(&srv->device, srv->irq, pcie_bwnotif_irq,
> > + IRQF_SHARED, "PCIe bwctrl", srv);
> > if (ret)
> > return ret;
> >
> > --
> > 2.39.5
> >
>
