Without irq_create_mapping(), the correct irq number cannot be
provided. In this case, it makes problem such as NULL deference.
Thus, irq_create_mapping() should be added for MSI.
Signed-off-by: Jingoo Han <jg1.han@xxxxxxxxxxx>
Cc: Kishon Vijay Abraham I <kishon@xxxxxx>
---
Tested on Exynos5440.
drivers/pci/host/pcie-designware.c | 10 ++++------
drivers/pci/host/pcie-designware.h | 1 +
2 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 8963017..e536bb6 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -237,6 +237,8 @@ static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
}
}
+ pp->msi_irq_start = irq_create_mapping(pp->irq_domain, 0);
+
irq = (pp->msi_irq_start + pos0);
if ((irq + no_irqs) > (pp->msi_irq_start + MAX_MSI_IRQS-1))
@@ -372,8 +374,6 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
struct of_pci_range_parser parser;
u32 val;
- struct irq_domain *irq_domain;
-
if (of_pci_range_parser_init(&parser, np)) {
dev_err(pp->dev, "missing ranges property\n");
return -EINVAL;
@@ -441,15 +441,13 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
}
if (IS_ENABLED(CONFIG_PCI_MSI)) {
- irq_domain = irq_domain_add_linear(pp->dev->of_node,
+ pp->irq_domain = irq_domain_add_linear(pp->dev->of_node,
MAX_MSI_IRQS, &msi_domain_ops,
&dw_pcie_msi_chip);
- if (!irq_domain) {
+ if (!pp->irq_domain) {
dev_err(pp->dev, "irq domain init failed\n");
return -ENXIO;
}
-
- pp->msi_irq_start = irq_find_mapping(irq_domain, 0);
}
if (pp->ops->host_init)
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
index faccbbf..240fc11 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -50,6 +50,7 @@ struct pcie_port {
int msi_irq_start;
unsigned long msi_data;
DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
+ struct irq_domain *irq_domain;
};
struct pcie_host_ops {
--
1.7.10.4
--
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