commit e433110eb5bf067f74d3d15c5fb252206c66ae0b
author Inochi Amaoto <inochiama@gmail.com> Tue Oct 14 09:46:07 2025 +0800
committer Bjorn Helgaas <bhelgaas@google.com> Fri Oct 17 08:30:34 2025 -0500
tree 4bca486874dfb0c0cac031bdbf3a3e87638e9b3a
parent 469276c06affdfd2d9e88c9f228bb81119ec1a20

PCI: vmd: Override irq_startup()/irq_shutdown() in vmd_init_dev_msi_info()

Since commit 54f45a30c0d0 ("PCI/MSI: Add startup/shutdown for per
device domains") set callback irq_startup() and irq_shutdown() of
the struct pci_msi[x]_template, __irq_startup() will always invokes
irq_startup() callback instead of irq_enable() callback overridden
in vmd_init_dev_msi_info(). This will not start the IRQ correctly.

Also override irq_startup()/irq_shutdown() in vmd_init_dev_msi_info(),
so the irq_startup() can invoke the real logic.

Fixes: 54f45a30c0d0 ("PCI/MSI: Add startup/shutdown for per device domains")
Reported-by: Kenneth Crudup <kenny@panix.com>
Closes: https://lore.kernel.org/r/8a923590-5b3a-406f-a324-7bd1cf894d8f@panix.com/
Reported-by: Genes Lists <lists@sapience.com>
Closes: https://lore.kernel.org/r/4b392af8847cc19720ffcd53865f60ab3edc56b3.camel@sapience.com
Reported-by: Todd Brandt <todd.e.brandt@intel.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220658
Reported-by: Oliver Hartkopp <socketcan@hartkopp.net>
Closes: https://lore.kernel.org/r/8d6887a5-60bc-423c-8f7a-87b4ab739f6a@hartkopp.net
Reported-by: Hervé <herve@dxcv.net>
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Kenneth R. Crudup <kenny@panix.com>
Tested-by: Genes Lists <lists@sapience.com>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Tested-by: Hervé <herve@dxcv.net>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20251014014607.612586-1-inochiama@gmail.com

drivers/pci/controller/vmd.c

diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index 1bd5bf4..b4b62b9 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -192,6 +192,12 @@ static void vmd_pci_msi_enable(struct irq_data *data)
 	data->chip->irq_unmask(data);
 }
 
+static unsigned int vmd_pci_msi_startup(struct irq_data *data)
+{
+	vmd_pci_msi_enable(data);
+	return 0;
+}
+
 static void vmd_irq_disable(struct irq_data *data)
 {
 	struct vmd_irq *vmdirq = data->chip_data;
@@ -210,6 +216,11 @@ static void vmd_pci_msi_disable(struct irq_data *data)
 	vmd_irq_disable(data->parent_data);
 }
 
+static void vmd_pci_msi_shutdown(struct irq_data *data)
+{
+	vmd_pci_msi_disable(data);
+}
+
 static struct irq_chip vmd_msi_controller = {
 	.name			= "VMD-MSI",
 	.irq_compose_msi_msg	= vmd_compose_msi_msg,
@@ -309,6 +320,8 @@ static bool vmd_init_dev_msi_info(struct device *dev, struct irq_domain *domain,
 	if (!msi_lib_init_dev_msi_info(dev, domain, real_parent, info))
 		return false;
 
+	info->chip->irq_startup		= vmd_pci_msi_startup;
+	info->chip->irq_shutdown	= vmd_pci_msi_shutdown;
 	info->chip->irq_enable		= vmd_pci_msi_enable;
 	info->chip->irq_disable		= vmd_pci_msi_disable;
 	return true;