diff mbox

[v2,1/2] PCI: allow MSI chip providers to implement their own multivector MSI setup

Message ID 1437662976-27188-1-git-send-email-l.stach@pengutronix.de
State Changes Requested
Headers show

Commit Message

Lucas Stach July 23, 2015, 2:49 p.m. UTC 
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 drivers/pci/msi.c   | 3 +++
 include/linux/msi.h | 2 ++
 2 files changed, 5 insertions(+)
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Patch

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index f66be868ad21..685a83c459c6 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -121,9 +121,12 @@  void __weak arch_teardown_msi_irq(unsigned int irq)
 
 int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
+	struct msi_controller *chip = pci_msi_controller(dev);
 	struct msi_desc *entry;
 	int ret;
 
+	if (chip && chip->setup_irqs)
+		return chip->setup_irqs(chip, dev, nvec, type);
 	/*
 	 * If an architecture wants to support multiple MSI, it needs to
 	 * override arch_setup_msi_irqs()
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 8ac4a68ffae2..50fefeb30236 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -114,6 +114,8 @@  struct msi_controller {
 
 	int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev,
 			 struct msi_desc *desc);
+	int (*setup_irqs)(struct msi_controller *chip, struct pci_dev *dev,
+			  int nvec, int type);
 	void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
 };