On Mon, Aug 11, 2014 at 02:33:25PM +0000, Bharat.Bhushan@xxxxxxxxxxxxx wrote: > > > > -----Original Message----- > > From: linux-pci-owner@xxxxxxxxxxxxxxx [mailto:linux-pci-owner@xxxxxxxxxxxxxxx] > > On Behalf Of Alexander Gordeev > > Sent: Monday, August 11, 2014 5:16 PM > > To: Bjorn Helgaas > > Cc: linux-kernel@xxxxxxxxxxxxxxx; linuxppc-dev@xxxxxxxxxxxxxxxx; linux- > > pci@xxxxxxxxxxxxxxx > > Subject: [PATCH v2 2/2] PCI/MSI: Remove arch_msi_check_device() > > > > There are no archs that override arch_msi_check_device() hook. Remove it as it > > is completely redundant. > > Is not we are still overriding this in powerpc (not sure I missed some patch , if so please point to that). Patch 1/2 ;) > $ grep -r arch_msi_check_device arch/powerpc/ > Binary file arch/powerpc/kernel/msi.o matches > arch/powerpc/kernel/msi.c:int arch_msi_check_device(struct pci_dev* dev, int nvec, int type) > Binary file arch/powerpc/kernel/built-in.o matches > > Thanks > -Bharat > > > > > If an arch would need to check MSI/MSI-X possibility for a device it should make > > it within arch_setup_msi_irqs() hook. > > > > Cc: linuxppc-dev@xxxxxxxxxxxxxxxx > > Cc: linux-pci@xxxxxxxxxxxxxxx > > Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx> > > --- > > drivers/pci/msi.c | 49 +++++++++++++------------------------------------ > > include/linux/msi.h | 3 --- > > 2 files changed, 13 insertions(+), 39 deletions(-) > > > > diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 5a40516..6c2cc41 100644 > > --- a/drivers/pci/msi.c > > +++ b/drivers/pci/msi.c > > @@ -56,16 +56,6 @@ void __weak arch_teardown_msi_irq(unsigned int irq) > > chip->teardown_irq(chip, irq); > > } > > > > -int __weak arch_msi_check_device(struct pci_dev *dev, int nvec, int type) -{ > > - struct msi_chip *chip = dev->bus->msi; > > - > > - if (!chip || !chip->check_device) > > - return 0; > > - > > - return chip->check_device(chip, dev, nvec, type); > > -} > > - > > int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) { > > struct msi_desc *entry; > > @@ -806,22 +796,23 @@ out_free: > > } > > > > /** > > - * pci_msi_check_device - check whether MSI may be enabled on a device > > + * pci_msi_supported - check whether MSI may be enabled on a device > > * @dev: pointer to the pci_dev data structure of MSI device function > > * @nvec: how many MSIs have been requested ? > > - * @type: are we checking for MSI or MSI-X ? > > * > > * Look at global flags, the device itself, and its parent buses > > * to determine if MSI/-X are supported for the device. If MSI/-X is > > * supported return 0, else return an error code. > > **/ > > -static int pci_msi_check_device(struct pci_dev *dev, int nvec, int type) > > +static int pci_msi_supported(struct pci_dev *dev, int nvec) > > { > > struct pci_bus *bus; > > - int ret; > > > > /* MSI must be globally enabled and supported by the device */ > > - if (!pci_msi_enable || !dev || dev->no_msi) > > + if (!pci_msi_enable) > > + return -EINVAL; > > + > > + if (!dev || dev->no_msi || dev->current_state != PCI_D0) > > return -EINVAL; > > > > /* > > @@ -843,10 +834,6 @@ static int pci_msi_check_device(struct pci_dev *dev, int > > nvec, int type) > > if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI) > > return -EINVAL; > > > > - ret = arch_msi_check_device(dev, nvec, type); > > - if (ret) > > - return ret; > > - > > return 0; > > } > > > > @@ -949,13 +936,13 @@ int pci_enable_msix(struct pci_dev *dev, struct msix_entry > > *entries, int nvec) > > int status, nr_entries; > > int i, j; > > > > - if (!entries || !dev->msix_cap || dev->current_state != PCI_D0) > > - return -EINVAL; > > - > > - status = pci_msi_check_device(dev, nvec, PCI_CAP_ID_MSIX); > > + status = pci_msi_supported(dev, nvec); > > if (status) > > return status; > > > > + if (!entries) > > + return -EINVAL; > > + > > nr_entries = pci_msix_vec_count(dev); > > if (nr_entries < 0) > > return nr_entries; > > @@ -1062,8 +1049,9 @@ int pci_enable_msi_range(struct pci_dev *dev, int minvec, > > int maxvec) > > int nvec; > > int rc; > > > > - if (dev->current_state != PCI_D0) > > - return -EINVAL; > > + rc = pci_msi_supported(dev, minvec); > > + if (rc) > > + return rc; > > > > WARN_ON(!!dev->msi_enabled); > > > > @@ -1086,17 +1074,6 @@ int pci_enable_msi_range(struct pci_dev *dev, int minvec, > > int maxvec) > > nvec = maxvec; > > > > do { > > - rc = pci_msi_check_device(dev, nvec, PCI_CAP_ID_MSI); > > - if (rc < 0) { > > - return rc; > > - } else if (rc > 0) { > > - if (rc < minvec) > > - return -ENOSPC; > > - nvec = rc; > > - } > > - } while (rc); > > - > > - do { > > rc = msi_capability_init(dev, nvec); > > if (rc < 0) { > > return rc; > > diff --git a/include/linux/msi.h b/include/linux/msi.h index 8103f32..dbf7cc9 > > 100644 > > --- a/include/linux/msi.h > > +++ b/include/linux/msi.h > > @@ -60,7 +60,6 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc > > *desc); void arch_teardown_msi_irq(unsigned int irq); int > > arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); void > > arch_teardown_msi_irqs(struct pci_dev *dev); -int arch_msi_check_device(struct > > pci_dev* dev, int nvec, int type); void arch_restore_msi_irqs(struct pci_dev > > *dev); > > > > void default_teardown_msi_irqs(struct pci_dev *dev); @@ -77,8 +76,6 @@ struct > > msi_chip { > > int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev, > > struct msi_desc *desc); > > void (*teardown_irq)(struct msi_chip *chip, unsigned int irq); > > - int (*check_device)(struct msi_chip *chip, struct pci_dev *dev, > > - int nvec, int type); > > }; > > > > #endif /* LINUX_MSI_H */ > > -- > > 1.9.3 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body > > of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at > > http://vger.kernel.org/majordomo-info.html -- Regards, Alexander Gordeev agordeev@xxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
