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PCI: aardvark: Mask all interrupts when unbinding driver

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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 <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Pali Rohár 2021-11-30 18:29:09 +01:00 committed by Lorenzo Pieralisi
parent a46f2f6dd4
commit 13bcdf07cb
1 changed files with 21 additions and 0 deletions
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21
drivers/pci/controller/pci-aardvark.c
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@ -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);