diff mbox series

[v19,03/10] PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check

Message ID 20250609-ep-msi-v19-3-77362eaa48fa@nxp.com
State New
Headers show
Series [v19,01/10] PCI: endpoint: Set ID and of_node for function driver | expand

Commit Message

Frank Li June 9, 2025, 4:34 p.m. UTC 
Some MSI controller change address/data pair when irq_set_affinity().
Current PCI endpoint can't support this type MSI controller. Call
irq_domain_is_msi_immutable() check if address/data pair immutable.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
change in v18
- update commit message. remove 'include/linux/msi.h' part.

change from v14 to v17
- none

change from  v13 to v14
- bring v10 back

Change from v9 to v10
- new patch
---
 drivers/pci/endpoint/pci-ep-msi.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/endpoint/pci-ep-msi.c b/drivers/pci/endpoint/pci-ep-msi.c
index 549b55b864d0e..c0e2d806ee658 100644
--- a/drivers/pci/endpoint/pci-ep-msi.c
+++ b/drivers/pci/endpoint/pci-ep-msi.c
@@ -44,6 +44,14 @@  int pci_epf_alloc_doorbell(struct pci_epf *epf, u16 num_db)
 
 	dev_set_msi_domain(dev, dom);
 
+	if (!irq_domain_is_msi_parent(dom))
+		return -EINVAL;
+
+	if (!irq_domain_is_msi_immutable(dom)) {
+		dev_err(dev, "Can't support mutable address/data pair MSI controller\n");
+		return -EINVAL;
+	}
+
 	msg = kcalloc(num_db, sizeof(struct pci_epf_doorbell_msg), GFP_KERNEL);
 	if (!msg)
 		return -ENOMEM;