diff options
| author |   Marc Zyngier <maz@kernel.org> | 2025-07-08 18:34:01 +0100 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2025-07-22 15:33:16 -0500 |
| commit | 3cc8f625e4c6a0e9f936da6b94166e62e387fe1d (patch) | |
| tree | dcc36e6ddf2ff346986a4b4696a1941b0915b0bc | |
| parent | PCI: xgene-msi: Sanitise MSI allocation and affinity setting (diff) | |
| download | wireguard-linux-3cc8f625e4c6a0e9f936da6b94166e62e387fe1d.tar.xz wireguard-linux-3cc8f625e4c6a0e9f936da6b94166e62e387fe1d.zip | |
PCI: xgene-msi: Resend an MSI racing with itself on a different CPU
Since changing the affinity of an MSI really is about changing
the target address and that it isn't possible to mask an individual
MSI, it is completely possible for an interrupt to race with itself,
usually resulting in a lost interrupt.
Paper over the design blunder by informing the core code of this
sad state of affairs.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20250708173404.1278635-11-maz@kernel.org
| -rw-r--r-- | drivers/pci/controller/pci-xgene-msi.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/controller/pci-xgene-msi.c b/drivers/pci/controller/pci-xgene-msi.c index 954bc5513164..0ae8f29025bf 100644 --- a/drivers/pci/controller/pci-xgene-msi.c +++ b/drivers/pci/controller/pci-xgene-msi.c @@ -183,6 +183,7 @@ static int xgene_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, irq_domain_set_info(domain, virq, hwirq, &xgene_msi_bottom_irq_chip, domain->host_data, handle_simple_irq, NULL, NULL); + irqd_set_resend_when_in_progress(irq_get_irq_data(virq)); return 0; } |