diff options
| author | Pratyush Anand <pratyush.anand@st.com> | 2013-10-09 12:32:12 (GMT) |
|---|---|---|
| committer | Matthew Weigel <Matthew.Weigel@freescale.com> | 2014-12-11 18:36:49 (GMT) |
| commit | 229db881a4acd7786ba1db876fc6b7dd5e0f4ece (patch) | |
| tree | 2f04f7a5ae3b2952882703cab7f37d48d1c325f0 /drivers/pci | |
| parent | 252fe9bb34c4db300af6b1da731ac0636a21e3b5 (diff) | |
| download | linux-fsl-qoriq-229db881a4acd7786ba1db876fc6b7dd5e0f4ece.tar.xz | |
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>
The patch comes from:
https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?id=904d0e7889933fb48d921c998fd1cabb3a9d6635
Change-Id: I79a67a778cc2b1de70aef538786f37c83d31d0de
Reviewed-on: http://git.am.freescale.net:8181/19681
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Zhengxiong Jin <Jason.Jin@freescale.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pcie-designware.c | 25 | ||||
| -rw-r--r-- | drivers/pci/host/pcie-designware.h | 2 |
2 files changed, 14 insertions, 13 deletions
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index 762fbb2..53c60c7 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -157,7 +157,7 @@ static struct irq_chip dw_msi_irq_chip = { 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 @@ void dw_handle_msi_irq(struct pcie_port *pp) 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 @@ static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos) } } - 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 @@ static void clear_irq(unsigned int irq) 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 @@ static void clear_irq(unsigned int irq) return; } - pos = irq - pp->msi_irq_start; + pos = data->hwirq; irq_free_desc(irq); @@ -371,8 +372,7 @@ int __init dw_pcie_host_init(struct pcie_port *pp) 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 @@ 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); + for (i = 0; i < MAX_MSI_IRQS; i++) + irq_create_mapping(pp->irq_domain, i); } if (pp->ops->host_init) diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h index 890c2ce..c15379b 100644 --- a/drivers/pci/host/pcie-designware.h +++ b/drivers/pci/host/pcie-designware.h @@ -50,7 +50,7 @@ struct pcie_port { u32 lanes; struct pcie_host_ops *ops; int msi_irq; - int msi_irq_start; + struct irq_domain *irq_domain; unsigned long msi_data; DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); }; |