diff options
Diffstat (limited to '0003-PCI-MSI-Deal-with-devices-lying-about-their-MSI-mask.patch')
| -rw-r--r-- | 0003-PCI-MSI-Deal-with-devices-lying-about-their-MSI-mask.patch | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/0003-PCI-MSI-Deal-with-devices-lying-about-their-MSI-mask.patch b/0003-PCI-MSI-Deal-with-devices-lying-about-their-MSI-mask.patch deleted file mode 100644 index 2e55d5d..0000000 --- a/0003-PCI-MSI-Deal-with-devices-lying-about-their-MSI-mask.patch +++ /dev/null @@ -1,56 +0,0 @@ -From 946e7362fca464b136ec89171e565e33153ccdcf Mon Sep 17 00:00:00 2001 -From: Marc Zyngier <maz@kernel.org> -Date: Thu, 4 Nov 2021 18:01:29 +0000 -Subject: [PATCH 3/8] PCI/MSI: Deal with devices lying about their MSI mask - capability - -It appears that some devices are lying about their mask capability, -pretending that they don't have it, while they actually do. -The net result is that now that we don't enable MSIs on such -endpoint. - -Add a new per-device flag to deal with this. Further patches will -make use of it, sadly. - -Signed-off-by: Marc Zyngier <maz@kernel.org> -Signed-off-by: Thomas Gleixner <tglx@linutronix.de> -Reviewed-by: Thomas Gleixner <tglx@linutronix.de> -Link: https://lore.kernel.org/r/20211104180130.3825416-2-maz@kernel.org -Cc: Bjorn Helgaas <helgaas@kernel.org> -For: https://bugs.archlinux.org/task/72734 -For: https://bugs.archlinux.org/task/72777 ---- - drivers/pci/msi.c | 3 +++ - include/linux/pci.h | 2 ++ - 2 files changed, 5 insertions(+) - -diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c -index ea6371eb9b25..e2dedfa9072d 100644 ---- a/drivers/pci/msi.c -+++ b/drivers/pci/msi.c -@@ -477,6 +477,9 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd) - goto out; - - pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control); -+ /* Lies, damned lies, and MSIs */ -+ if (dev->dev_flags & PCI_DEV_FLAGS_HAS_MSI_MASKING) -+ control |= PCI_MSI_FLAGS_MASKBIT; - - entry->msi_attrib.is_msix = 0; - entry->msi_attrib.is_64 = !!(control & PCI_MSI_FLAGS_64BIT); -diff --git a/include/linux/pci.h b/include/linux/pci.h -index cd8aa6fce204..152a4d74f87f 100644 ---- a/include/linux/pci.h -+++ b/include/linux/pci.h -@@ -233,6 +233,8 @@ enum pci_dev_flags { - PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10), - /* Don't use Relaxed Ordering for TLPs directed at this device */ - PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11), -+ /* Device does honor MSI masking despite saying otherwise */ -+ PCI_DEV_FLAGS_HAS_MSI_MASKING = (__force pci_dev_flags_t) (1 << 12), - }; - - enum pci_irq_reroute_variant { --- -2.33.1 - |