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authorMarc Zyngier <maz@kernel.org>2021-09-29 19:38:36 +0300
committerBjorn Helgaas <bhelgaas@google.com>2021-11-04 22:16:56 +0300
commit978fd0056e19defc406208556e6eee133784b605 (patch)
treeb18ea40bfaee6557c42f732cb9a69f14a6845448 /drivers/pci/of.c
parent0412841812265734c306ba5ef8088bcb64d5d3bd (diff)
downloadlinux-978fd0056e19defc406208556e6eee133784b605.tar.xz
PCI: of: Allow matching of an interrupt-map local to a PCI device
Just as we now allow an interrupt map to be parsed when part of an interrupt controller, there is no reason to ignore an interrupt map that would be part of a pci device node such as a root port since we already allow interrupt specifiers. Allow the matching of such property when local to the node of a PCI device, which allows the device itself to use the interrupt map for for its own purpose. Link: https://lore.kernel.org/r/20210929163847.2807812-4-maz@kernel.org Tested-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Signed-off-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/pci/of.c')
-rw-r--r--drivers/pci/of.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index d84381ce82b5..0b1237cff239 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -423,7 +423,7 @@ failed:
*/
static int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq)
{
- struct device_node *dn, *ppnode;
+ struct device_node *dn, *ppnode = NULL;
struct pci_dev *ppdev;
__be32 laddr[3];
u8 pin;
@@ -452,8 +452,14 @@ static int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *
if (pin == 0)
return -ENODEV;
+ /* Local interrupt-map in the device node? Use it! */
+ if (of_get_property(dn, "interrupt-map", NULL)) {
+ pin = pci_swizzle_interrupt_pin(pdev, pin);
+ ppnode = dn;
+ }
+
/* Now we walk up the PCI tree */
- for (;;) {
+ while (!ppnode) {
/* Get the pci_dev of our parent */
ppdev = pdev->bus->self;