On Tue, Mar 24, 2015 at 06:33:57PM -0500, Bjorn Helgaas wrote:
> On Tue, Mar 24, 2015 at 04:42:35PM +0100, Michael S. Tsirkin wrote:
> > pci_msi_init_pci_dev and pci_msi_off share a lot of code.
> > This used to be justified since pci_msi_init_pci_dev
> > wasn't compiled in when CONFIG_PCI_MSI is off.
> > Now that it is, let's reuse code.
> >
> > Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
> > ---
> > drivers/pci/pci.c | 24 +++++-------------------
> > drivers/pci/probe.c | 11 ++++-------
> > 2 files changed, 9 insertions(+), 26 deletions(-)
> >
> > diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> > index 81f06e8..d5f297a 100644
> > --- a/drivers/pci/pci.c
> > +++ b/drivers/pci/pci.c
> > @@ -3106,26 +3106,12 @@ EXPORT_SYMBOL_GPL(pci_check_and_unmask_intx);
> > */
> > void pci_msi_off(struct pci_dev *dev)
> > {
> > - int pos;
> > - u16 control;
> > + if (dev->msi_cap)
> > + pci_msi_set_enable(dev, 0);
> >
> > - /*
> > - * This looks like it could go in msi.c, but we need it even when
> > - * CONFIG_PCI_MSI=n. For the same reason, we can't use
> > - * dev->msi_cap or dev->msix_cap here.
> > - */
> > - pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
> > - if (pos) {
> > - pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
> > - control &= ~PCI_MSI_FLAGS_ENABLE;
> > - pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
> > - }
> > - pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
> > - if (pos) {
> > - pci_read_config_word(dev, pos + PCI_MSIX_FLAGS, &control);
> > - control &= ~PCI_MSIX_FLAGS_ENABLE;
> > - pci_write_config_word(dev, pos + PCI_MSIX_FLAGS, control);
> > - }
> > + dev->msix_cap = pci_find_capability(dev, PCI_CAP_ID_MSIX);
>
> I think the above line is superfluous, isn't it? You already do the same
> in pci_msi_init_pci_dev() (below).
Ugh. Yea. I'll fix that up, thanks!
> > + if (dev->msix_cap)
> > + pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
> > }
> > EXPORT_SYMBOL_GPL(pci_msi_off);
> >
> > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> > index 45d6d5c..baf8ddd 100644
> > --- a/drivers/pci/probe.c
> > +++ b/drivers/pci/probe.c
> > @@ -1489,17 +1489,14 @@ static void pci_msi_init_pci_dev(struct pci_dev
> > *dev)
> > INIT_LIST_HEAD(&dev->msi_list);
> > #endif
> >
> > + dev->msi_cap = pci_find_capability(dev, PCI_CAP_ID_MSI);
> > + dev->msix_cap = pci_find_capability(dev, PCI_CAP_ID_MSIX);
> > +
> > /* Disable the msi hardware to avoid screaming interrupts
> > * during boot. This is the power on reset default so
> > * usually this should be a noop.
> > */
> > - dev->msi_cap = pci_find_capability(dev, PCI_CAP_ID_MSI);
> > - if (dev->msi_cap)
> > - pci_msi_set_enable(dev, 0);
> > -
> > - dev->msix_cap = pci_find_capability(dev, PCI_CAP_ID_MSIX);
> > - if (dev->msix_cap)
> > - pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
> > + pci_msi_off(dev);
> > }
> >
> > static void pci_init_capabilities(struct pci_dev *dev)
> > --
> > MST
> >
--
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