From 55e38c42051dc27224c5d27a5d81a8b85c324d0a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= Date: Wed, 4 May 2022 18:57:32 +0200 Subject: [PATCH] PCI: aardvark: Mask all interrupts when unbinding driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 13bcdf07cb2ecff5d45d2c141df2539b15211448 upstream. 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 Signed-off-by: Marek Behún Signed-off-by: Greg Kroah-Hartman --- drivers/pci/controller/pci-aardvark.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index ee6ffba2af22..d2c01c6e6815 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1693,6 +1693,27 @@ 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);