[PATCH 2/2] PCI/MSI: Update MSI-X irq domain hwsize

[Guixin Liu]

After the upper-layer driver removes the device and before the next
probe, events such as firmware updates may increase the number of
interrupts supported by the device. However, the irq_domain still
retains the old hwsize, which causes subsequent interrupt allocation
failures. Update hwsize during MSI-X device domain setup to fix this
issue.

Signed-off-by: Guixin Liu <kanie@xxxxxxxxxxxxxxxxx>
Reviewed-by: Guanghui Feng <guanghuifeng@xxxxxxxxxxxxxxxxx>
---
 drivers/pci/msi/irqdomain.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c
index 6e65f0f44112..485bfba059cc 100644
--- a/drivers/pci/msi/irqdomain.c
+++ b/drivers/pci/msi/irqdomain.c
@@ -274,8 +274,11 @@ bool pci_setup_msix_device_domain(struct pci_dev *pdev, unsigned int hwsize)
 	if (WARN_ON_ONCE(pdev->msi_enabled))
 		return false;
 
-	if (pci_match_device_domain(pdev, DOMAIN_BUS_PCI_DEVICE_MSIX))
+	if (pci_match_device_domain(pdev, DOMAIN_BUS_PCI_DEVICE_MSIX)) {
+		if (msi_domain_update_hwsize(&pdev->dev, MSI_DEFAULT_DOMAIN, hwsize))
+			pr_warn("too big MSI-X hwsize:%u\n", hwsize);
 		return true;
+	}
 	if (pci_match_device_domain(pdev, DOMAIN_BUS_PCI_DEVICE_MSI))
 		msi_remove_device_irq_domain(&pdev->dev, MSI_DEFAULT_DOMAIN);
 
-- 
2.32.0.3.g01195cf9f