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PCI: rcar: Remove IRQ mappings in rcar_pcie_enable_msi() failpath 

The rcar_pcie_enable_msi() creates IRQ mappings using irq_create_mapping()
before requesting the IRQs using devm_request_irq(). If devm_request_irq()
fails for some reason, rcar_pcie_enable_msi() does not remove the mapping.

Pull out the code for disposing IRQ mappings from rcar_pcie_teardown_msi()
into a separate function and call it from both rcar_pcie_teardown_msi()
and rcar_pcie_enable_msi() failpath to remove the mappings correctly.

Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Simon Horman <horms+renesas@verge.net.au>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-renesas-soc@vger.kernel.org
This commit is contained in:
Marek Vasut 2018-05-24 16:36:23 +02:00 committed by Lorenzo Pieralisi
parent 1aea58be73
commit 0bbf6b9230
1 changed files with 16 additions and 9 deletions
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25
drivers/pci/host/pcie-rcar.c
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@ -866,6 +866,20 @@ static const struct irq_domain_ops msi_domain_ops = {
.map = rcar_msi_map,
};
static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie)
{
struct rcar_msi *msi = &pcie->msi;
int i, irq;
for (i = 0; i < INT_PCI_MSI_NR; i++) {
irq = irq_find_mapping(msi->domain, i);
if (irq > 0)
irq_dispose_mapping(irq);
}
irq_domain_remove(msi->domain);
}
static int rcar_pcie_enable_msi(struct rcar_pcie *pcie)
{
struct device *dev = pcie->dev;
@ -920,14 +934,13 @@ static int rcar_pcie_enable_msi(struct rcar_pcie *pcie)
return 0;
err:
irq_domain_remove(msi->domain);
rcar_pcie_unmap_msi(pcie);
return err;
}
static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie)
{
struct rcar_msi *msi = &pcie->msi;
int irq, i;
/* Disable all MSI interrupts */
rcar_pci_write_reg(pcie, 0, PCIEMSIIER);
@ -937,13 +950,7 @@ static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie)
free_pages(msi->pages, 0);
for (i = 0; i < INT_PCI_MSI_NR; i++) {
irq = irq_find_mapping(msi->domain, i);
if (irq > 0)
irq_dispose_mapping(irq);
}
irq_domain_remove(msi->domain);
rcar_pcie_unmap_msi(pcie);
}
static int rcar_pcie_get_resources(struct rcar_pcie *pcie)