PCI: designware: Add irq_create_mapping()
Without irq_create_mapping(), the correct IRQ number cannot be
provided. In this case, it makes problems such as NULL dereference.
Thus, irq_create_mapping() should be added for MSI.
Suggested-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index a2e69af..1e1fea4 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -157,7 +157,7 @@
void dw_handle_msi_irq(struct pcie_port *pp)
{
unsigned long val;
- int i, pos;
+ int i, pos, irq;
for (i = 0; i < MAX_MSI_CTRLS; i++) {
dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
@@ -165,8 +165,9 @@
if (val) {
pos = 0;
while ((pos = find_next_bit(&val, 32, pos)) != 32) {
- generic_handle_irq(pp->msi_irq_start
- + (i * 32) + pos);
+ irq = irq_find_mapping(pp->irq_domain,
+ i * 32 + pos);
+ generic_handle_irq(irq);
pos++;
}
}
@@ -237,9 +238,8 @@
}
}
- irq = (pp->msi_irq_start + pos0);
-
- if ((irq + no_irqs) > (pp->msi_irq_start + MAX_MSI_IRQS-1))
+ irq = irq_find_mapping(pp->irq_domain, pos0);
+ if (!irq)
goto no_valid_irq;
i = 0;
@@ -270,6 +270,7 @@
struct irq_desc *desc;
struct msi_desc *msi;
struct pcie_port *pp;
+ struct irq_data *data = irq_get_irq_data(irq);
/* get the port structure */
desc = irq_to_desc(irq);
@@ -280,7 +281,7 @@
return;
}
- pos = irq - pp->msi_irq_start;
+ pos = data->hwirq;
irq_free_desc(irq);
@@ -371,8 +372,7 @@
struct of_pci_range range;
struct of_pci_range_parser parser;
u32 val;
-
- struct irq_domain *irq_domain;
+ int i;
if (of_pci_range_parser_init(&parser, np)) {
dev_err(pp->dev, "missing ranges property\n");
@@ -441,15 +441,16 @@
}
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);
+ for (i = 0; i < MAX_MSI_IRQS; i++)
+ irq_create_mapping(pp->irq_domain, i);
}
if (pp->ops->host_init)