From 0bbf6b9230df602616a6c6f5861e8964e9162f4a Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Thu, 24 May 2018 16:36:23 +0200 Subject: 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 Signed-off-by: Marek Vasut Signed-off-by: Lorenzo Pieralisi Cc: Geert Uytterhoeven Cc: Lorenzo Pieralisi Cc: Phil Edworthy Cc: Simon Horman Cc: Wolfram Sang Cc: linux-renesas-soc@vger.kernel.org --- drivers/pci/host/pcie-rcar.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) (limited to 'drivers/pci') diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index 4843a4dc6059..636c3c5095d2 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -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) -- cgit v1.2.3