| Message ID | 20241113124158.22863-9-pstanner@redhat.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Johannes Berg |
| Headers | show |
| Series | Remove implicit devres from pci_intx() | expand |
On Wed, Nov 13 2024 at 13:41, Philipp Stanner wrote: > pci_intx() is a hybrid function which can sometimes be managed through > devres. To remove this hybrid nature from pci_intx(), it is necessary to > port users to either an always-managed or a never-managed version. > > MSI sets up its own separate devres callback implicitly in > pcim_setup_msi_release(). This callback ultimately uses pci_intx(), > which is problematic since the callback of course runs on driver-detach. > > That problem has last been described here: > https://lore.kernel.org/all/ee44ea7ac760e73edad3f20b30b4d2fff66c1a85.camel@redhat.com/ > > Replace the call to pci_intx() with one to the never-managed version > pci_intx_unmanaged(). > > Signed-off-by: Philipp Stanner <pstanner@redhat.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c index b956ce591f96..c95e2e7dc9ab 100644 --- a/drivers/pci/msi/api.c +++ b/drivers/pci/msi/api.c @@ -289,7 +289,7 @@ int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs, */ if (affd) irq_create_affinity_masks(1, affd); - pci_intx(dev, 1); + pci_intx_unmanaged(dev, 1); return 1; } } diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index 3a45879d85db..53f13b09db50 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -268,7 +268,7 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg); static void pci_intx_for_msi(struct pci_dev *dev, int enable) { if (!(dev->dev_flags & PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG)) - pci_intx(dev, enable); + pci_intx_unmanaged(dev, enable); } static void pci_msi_set_enable(struct pci_dev *dev, int enable)
pci_intx() is a hybrid function which can sometimes be managed through devres. To remove this hybrid nature from pci_intx(), it is necessary to port users to either an always-managed or a never-managed version. MSI sets up its own separate devres callback implicitly in pcim_setup_msi_release(). This callback ultimately uses pci_intx(), which is problematic since the callback of course runs on driver-detach. That problem has last been described here: https://lore.kernel.org/all/ee44ea7ac760e73edad3f20b30b4d2fff66c1a85.camel@redhat.com/ Replace the call to pci_intx() with one to the never-managed version pci_intx_unmanaged(). Signed-off-by: Philipp Stanner <pstanner@redhat.com> --- drivers/pci/msi/api.c | 2 +- drivers/pci/msi/msi.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)