From: Pali Rohár Date: Tue, 30 Nov 2021 17:29:09 +0000 (+0100) Subject: PCI: aardvark: Mask all interrupts when unbinding driver X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=13bcdf07cb2ecff5d45d2c141df2539b15211448;p=linux.git PCI: aardvark: Mask all interrupts when unbinding driver Ensure that no interrupt can be triggered after driver unbind. Link: https://lore.kernel.org/r/20211130172913.9727-8-kabel@kernel.org Signed-off-by: Pali Rohár Signed-off-by: Marek Behún Signed-off-by: Lorenzo Pieralisi --- diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 12eae05f3d102..08b34accfe2f5 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1709,6 +1709,27 @@ static int advk_pcie_remove(struct platform_device *pdev) val &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); advk_writel(pcie, val, PCIE_CORE_CMD_STATUS_REG); + /* Disable MSI */ + val = advk_readl(pcie, PCIE_CORE_CTRL2_REG); + val &= ~PCIE_CORE_CTRL2_MSI_ENABLE; + advk_writel(pcie, val, PCIE_CORE_CTRL2_REG); + + /* Clear MSI address */ + advk_writel(pcie, 0, PCIE_MSI_ADDR_LOW_REG); + advk_writel(pcie, 0, PCIE_MSI_ADDR_HIGH_REG); + + /* Mask all interrupts */ + advk_writel(pcie, PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG); + advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_MASK_REG); + advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_MASK_REG); + advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_MASK_REG); + + /* Clear all interrupts */ + advk_writel(pcie, PCIE_MSI_ALL_MASK, PCIE_MSI_STATUS_REG); + advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_REG); + advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_REG); + advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG); + /* Remove IRQ domains */ advk_pcie_remove_msi_irq_domain(pcie); advk_pcie_remove_irq_domain(pcie);